CN113644988A - Communication terminal and test method - Google Patents
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- CN113644988A CN113644988A CN202110923772.2A CN202110923772A CN113644988A CN 113644988 A CN113644988 A CN 113644988A CN 202110923772 A CN202110923772 A CN 202110923772A CN 113644988 A CN113644988 A CN 113644988A
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- 238000004891 communication Methods 0.000 title claims abstract description 53
- 238000010998 test method Methods 0.000 title claims abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 35
- 238000012360 testing method Methods 0.000 claims description 34
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 8
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- 238000012546 transfer Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/24—Arrangements for testing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The disclosure belongs to the technical field of communication, and particularly relates to a communication terminal and a test method. The communication terminal comprises a main board and a switch device; the switch device has an open state and a closed state, and the main board comprises a power chip, a control chip and a detection circuit; the control chip stores a first calibration parameter and a second calibration parameter; the detection circuit comprises a first node, a second node and a third node, wherein the first node is connected with the output end of the power supply chip, the second node is connected with the control chip, and the third node is connected with the switching device; when the switching device is in an off state, the detection circuit transmits a first level signal to the control chip through the second node so that the control chip can call and output a first calibration parameter; when the switching device is in a closed state, the detection circuit transmits a second level signal to the control chip through the second node, so that the control chip calls and outputs a second calibration parameter. The scheme of the disclosure can reduce the SAR value of the communication terminal.
Description
Technical Field
The disclosure belongs to the technical field of communication, and particularly relates to a communication terminal and a test method.
Background
At present, the communication terminal may be a mobile phone, a computer, or a wireless router. When the communication terminal is a mobile phone, the mobile phone leaves the factory and needs to be subjected to wired calibration, so that the maximum transmitting power of the mainboard meets the 3GPP standard, and the communication signal strength of the mobile phone can be ensured. However, under the condition of meeting the communication signal strength of the mobile phone, the transmitting power of the mobile phone during the process of making and receiving a call is relatively large, so that the SAR (Specific Absorption Ratio) of the mobile phone is large, thereby affecting the health of the human body. Especially when the antenna is blocked in various hand-held states, the radiation is more severe. The existing mobile phone can hardly meet the 3GPP standard of the factory of the mobile phone, and can reduce the SAR value of the mobile phone in the using process.
Disclosure of Invention
An object of the present disclosure is to provide a communication terminal and a test method, thereby overcoming, at least to some extent, one or more problems due to limitations and disadvantages of the related art.
A first aspect of the present disclosure provides a communication terminal, including a main board and a switching device; the switch device has an open state and a closed state, and the mainboard comprises a power supply chip, a control chip and a detection circuit;
a first calibration parameter and a second calibration parameter are stored in the control chip, the first calibration parameter corresponds to the maximum transmitting power of the mainboard, and the second calibration parameter corresponds to the maximum transmitting power of the communication terminal;
the detection circuit comprises a first node, a second node and a third node, wherein the first node is connected with the output end of the power supply chip, the second node is connected with the control chip, and the third node is connected with the switching device; wherein,
when the switching device is in an off state, the detection circuit transmits a first level signal to the control chip through the second node so that the control chip can call and output the first calibration parameter;
when the switching device is in a closed state, the detection circuit transmits a second level signal to the control chip through the second node, so that the control chip can call and output the second calibration parameter.
In one exemplary embodiment of the present disclosure,
the detection circuit further includes:
a fourth node;
a fifth node;
the two ends of the first resistor are respectively connected with the first node and the fourth node;
the two ends of the second resistor are respectively connected with the second node and the fifth node;
a third resistor, two ends of which are respectively connected with the third node and the fourth node;
and the transistor comprises a control end, a first end and a second end, wherein the control end is connected with the second node, the first end is grounded, and the second end is connected with the fourth node.
In one exemplary embodiment of the present disclosure,
the resistance value of the third resistor is smaller than the resistance value of the first resistor and the resistance value of the second resistor.
In one exemplary embodiment of the present disclosure,
the ratio of the resistance value of the first resistor to the resistance value of the third resistor ranges from 5 to 20.
In one exemplary embodiment of the present disclosure,
the first level signal is less than the second level signal.
In one exemplary embodiment of the present disclosure,
the communication terminal further comprises a small plate provided with a ground terminal, and the ground terminal is connected with the third node through the switching device.
In one exemplary embodiment of the present disclosure,
the switch device comprises a first coaxial line seat, a second coaxial line seat and a coaxial line, the first coaxial line seat is arranged on the mainboard and connected with the third node, the second coaxial line seat is arranged on the small plate and connected with the grounding end, and the coaxial line can be connected with or disconnected from the first coaxial line seat and the second coaxial line seat; wherein,
when the coaxial line is simultaneously connected with the first coaxial line seat and the second coaxial line seat, the switch device is in the closed state;
the switching device is in the open state when the coaxial line is disconnected from at least one of the first and second coaxial line holders.
In one exemplary embodiment of the present disclosure,
the communication terminal further includes:
a radio frequency amplifier;
the capacitor comprises a first polar plate and a second polar plate which are insulated and arranged oppositely, the first polar plate is connected with the radio frequency amplifier, the second polar plate is connected with the third node, and the capacitor is configured to block direct current.
In one exemplary embodiment of the present disclosure,
the small plate is also provided with an antenna switch and an inductor, the antenna switch is connected with the power supply chip, and two ends of the inductor are respectively connected with the grounding end and the second coaxial line seat;
the communication terminal further comprises an antenna, and the antenna is connected with the second coaxial line seat.
The second aspect of the present disclosure further provides a testing method, which is applied to the foregoing communication terminal, and the testing method includes the following steps:
adjusting the switching device to a disconnection state, and testing the transmitting power corresponding to the first calibration parameter output by the control chip;
and adjusting the switching device to a closed state, and testing the transmitting power corresponding to the second calibration parameter output by the control chip.
The communication terminal and the test method of the scheme have the following beneficial effects:
two sets of calibration parameters are pre-recorded into the control chip, namely a first calibration parameter of the maximum transmitting power of the mainboard and a second calibration parameter of the maximum transmitting power of the whole machine are carried out. When mainboard transmitting power, control chip can carry out the calling of first calibration parameter, when complete machine transmitting power used, control chip carries out the calling of second calibration parameter, both mutual independence, correspond respectively and transfer, thereby make when mainboard power test, control chip corresponds and transfers first calibration parameter, the transmitting power of mainboard can satisfy the 3GPP standard, when complete machine used, control chip corresponds and transfers the second calibration parameter, SAR value in the communication terminals use such as cell-phones also is in standard range.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows, or in part will be obvious from the description, or may be learned by practice of the disclosure.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 shows a block diagram of a communication terminal according to an embodiment of the present disclosure;
fig. 2 shows a block diagram of a main board in the communication terminal shown in fig. 1;
FIG. 3 is an enlarged view of A in FIG. 2;
fig. 4 is a flowchart of a testing method of the communication terminal shown in fig. 1.
Description of reference numerals: 100. a power supply chip; 200. a control chip; 300. a detection circuit; 310. a first resistor; 320. a second resistor; 330. a third resistor; 340. a transistor; 301. a first node; 302. a second node; 303. a third node; 304. a fourth node; 305. a fifth node; 400. a radio frequency amplifier; 500. a first coaxial line holder; 600. a second coaxial line holder; 700. an antenna switch; 800. an antenna; 900. a capacitor; 101. a main board; 102. a platelet; 103. an inductance; 104. a ground terminal; 105. a coaxial line.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the disclosure.
The present disclosure is described in further detail below with reference to the figures and the specific embodiments. It should be noted that the technical features involved in the embodiments of the present disclosure described below may be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the drawings are exemplary and intended to be configured to illustrate the present disclosure, but are not to be construed as limiting the present disclosure.
In the related art, before a mobile phone leaves a factory, a mainboard needs to be calibrated in a wired mode, and then a wireless consistency test of the whole mobile phone is carried out. Understandably, the wired calibration is to connect the mainboard to the instrument by using a test wire, transmit according to the wired maximum transmission power requirement, test and calibrate, and write the calibration parameters of the mainboard into the control chip; the wireless consistency test is to test whether the transmitting power of the whole mobile phone is normal or not when all the mobile phones are at the same position of the shielding box and in the direction of the maximum power. Although the mainboard after wired calibration can meet the 3GPP standard, namely the maximum transmitting power of the mainboard is at a certain limit value, when the maximum transmitting power of the mainboard is larger, the transmitting power of the whole mobile phone is also relatively larger when the whole mobile phone is used, so that the SAR value is relatively larger, and the human health is influenced. If the maximum transmission power of the main board is reduced, the SAR value may be within the standard range when the mobile phone is in use, but the maximum transmission power of the main board is reduced too much and may not meet the 3GPP standard. Therefore, the scheme is difficult to meet the 3GPP standard of the mobile phone before leaving the factory, and SAR can be quickly and effectively reduced.
The 3GPP standard specifies a third generation mobile communication standard based on a gsm map core network and using WCDMA as a radio interface.
In view of this, the embodiment of the present disclosure provides a communication terminal, which may be a mobile phone, and on the premise that the 3GPP standard before the mobile phone leaves the factory is satisfied, the SAR value in the use process of the mobile phone may also be effectively reduced.
Referring to fig. 1, fig. 2 and fig. 3, the communication terminal includes a main board 101 and a switch device; the switch device has an open state and a closed state, and the main board 101 comprises a power chip 100, a control chip 200 and a detection circuit 300; a first calibration parameter and a second calibration parameter are stored in the control chip 200, the first calibration parameter corresponds to the maximum transmitting power of the motherboard 101, and the second calibration parameter corresponds to the maximum transmitting power of the communication terminal; the detection circuit 300 includes a first node 301, a second node 302, and a third node 303, the first node 301 is connected to an output terminal of the power supply chip 100, the second node 302 is connected to the control chip 200, and the third node 303 is connected to the switching device. When the switching device is in an off state, the detection circuit 300 transmits a first level signal to the control chip 200 through the second node 302, so that the control chip 200 calls and outputs a first calibration parameter; when the switching device is in the closed state, the detection circuit 300 transmits a second level signal to the control chip 200 through the second node 302, so that the control chip 200 retrieves and outputs a second calibration parameter.
It should be noted that the output voltage of the power supply chip 100 may have various voltage values, and in this embodiment, the output voltage of the power supply chip 100 is 1.8V. In addition, the switching device in this scheme can play a role in controlling connection or disconnection between the main board 101 and the communication component in the communication terminal. When the switch device is in an off state, the communication component between the main board 101 and the communication terminal is in an off state, so that the maximum transmitting power of the main board 101 is facilitated; when the switch device is in the closed state, the main board 101 and the communication component in the communication terminal are in the connected state, so that the maximum transmission power of the whole device is facilitated.
In this scheme, two sets of calibration parameters are pre-recorded into the control chip 200, that is, a first calibration parameter for the maximum transmission power of the motherboard 101 and a second calibration parameter for the maximum transmission power of the whole device are performed. The data of the first calibration parameter can control the maximum transmission power of the main board 101 within a range and meet the requirements of 3GPP, and the second calibration parameter can enable the SAR value to be within a standard range when the whole machine transmits the maximum transmission power, so that the SAR requirement is met, the SAR value is reduced, and the harm to a human body is reduced. Specifically, when the power of the main board is transmitted, the control chip 200 can call a first calibration parameter, when the power of the whole machine is transmitted, the control chip 200 can call a second calibration parameter, the two calibration parameters are independent and respectively called correspondingly, so that when the power of the main board 101 is tested, the control chip 200 correspondingly calls the first calibration parameter, and the transmission power of the main board 101 can meet the 3GPP standard; when the whole machine is used, the control chip 200 correspondingly calls the second calibration parameter, and the SAR value of the communication terminal such as a mobile phone in the using process is also in the standard range. The control chip 200 mentioned in the present application may be a Central Processing Unit (CPU).
In addition, the switching device and the detection circuit 300 are matched, so that the control chip 200 can correspondingly call the first calibration parameter or the second calibration parameter, the on-off state of the switching device can determine that the communication components between the main board 101 and the terminal are in the connected or disconnected state, the detection circuit 300 correspondingly forms the first level signal or the second level signal at the second node 302 in the detection circuit 300 according to the states of the main board 101 and the terminal, and then the control chip 200 can recognize the first level signal and the second level signal at the second node 302, so that the first calibration parameter or the second calibration parameter in the control chip 200 can be correspondingly called according to the corresponding level signals.
In some embodiments of the present disclosure, referring to fig. 3, the detection circuit 300 further includes a fourth node 304, a fifth node 305, a first resistor 310, a second resistor 320, a third resistor 330, and a transistor 340. Two ends of the first resistor 310 are respectively connected with the first node 301 and the fourth node 304; the second resistor 320 has two ends connected to the second node 302 and the fifth node 305, respectively; both ends of the third resistor 330 are connected to the third node 303 and the fourth node 304, respectively; the transistor 340 includes a control terminal, a first terminal and a second terminal, the control terminal is connected to the second node 302, the first terminal is grounded, and the second terminal is connected to the fourth node 304.
In the detection circuit 300, a voltage division circuit is formed by the transistor 340 and each resistor, the power supply chip 100 outputs a voltage, the first node 301 is connected to the output end of the power supply chip 100, so that the first node 301 is always at a high level, when the switching device is in an off state, the fourth node 304 is at a high level, the transistor 340 is turned on, and the second node 302 is a first level signal and feeds back the first level signal to the control chip 200. When the switching device is in a closed state, the fourth node 304 is at a low level, the transistor 340 is turned off, and the second node 302 is a second level signal and feeds back to the control chip 200. The first level signal at the second node 302 is smaller than the second level signal, and in the case where the output voltage of the power supply chip 100 is 1.8V, the first level signal is a voltage close to 0V, and the second level signal may be 1.8V. The transistor 340 may be a metal-oxide-semiconductor (MOS) transistor.
In some embodiments of the present disclosure, the resistance of the third resistor 330 is smaller than the resistance of the first resistor 310 and the resistance of the second resistor 320. The resistance of the first resistor 310 and the resistance of the second resistor 320 may be 10k Ω, and the resistance of the third resistor 330 may be 1k Ω, but not limited thereto, the resistance of the first resistor 310 and the resistance of the second resistor 320 may be other resistances, such as 15k Ω or 20k Ω; of course, the resistance of the first resistor 310 and the resistance of the second resistor 320 may be equal or different. In addition, the ratio of the resistance of the first resistor 310 to the resistance of the third resistor 330 ranges from 5 to 20, for example: 5. 10, 15, 20, etc., which enable the voltage at the fourth node 304 in the detection circuit 300 to be sufficiently low and close to 0V when the switching device is closed, so as to facilitate the turning off of the transistor 340 in cooperation with the transistor 340.
In the present embodiment, the ratio of the resistance value of the first resistor 310 to the resistance value of the third resistor 330 is preferably 10.
In some embodiments of the present disclosure, referring to fig. 1, the communication terminal further includes a small board 102, the small board 102 is provided with a ground terminal 104, and the ground terminal 104 is connected to the third node 303 through a switching device. The switching device may include a first coaxial socket 500, a second coaxial socket 600, and a coaxial wire 105, the first coaxial socket 500 is disposed on the main board 101 and connected to the third node 303, the second coaxial socket 600 is disposed on the small board 102 and connected to the ground terminal 104, and the coaxial wire 105 can be connected to or disconnected from the first coaxial socket 500 and the second coaxial socket 600. Wherein the switching device is in a closed state when the coaxial line 105 is simultaneously connected with the first coaxial holder 500 and the second coaxial holder 600. When the coaxial line 105 is disconnected from at least one of the first coaxial holder 500 and the second coaxial holder 600, the switching device is in an open state.
By providing the ground terminal 104 on the small board 102, when the switching device is in a closed state, the small board 102 and the main board 101 can be grounded through the ground terminal 103, so that the fourth node 304 can be at a low level, and then the transistor 340 is turned off, the second node 302 is a second level signal and is fed back to the control chip 200, and the control chip 200 outputs the second calibration parameter. When the switching device is in an off state, the small board 102 and the main board 101 are disconnected, the fourth node 304 is at a high level, so that the transistor 340 is turned on, the second node 302 is a first level signal and is fed back to the control chip 200, and the control chip 200 outputs the first calibration parameter.
With reference to fig. 1, the communication terminal may further include an antenna 800, the antenna 800 is connected to the second coaxial base 600, and the antenna 800 may emit or receive electromagnetic waves. The small plate 102 is further provided with an antenna switch 700 and an inductor 103, the antenna switch 700 is connected with the power supply chip 100, the power supply chip 100 can supply power to the antenna switch 700, the antenna switch 700 can control and switch the working state of the antenna 800, and two ends of the inductor 103 are respectively connected with a grounding end and the second coaxial line base 600, wherein the inductor 103 is straight under the condition of direct current and can be used as a short-circuit device, the inductor 103 can be used as a tuning device when high-frequency waves occur, the inductor 103 can be used as a tuning device of the antenna 800 when a small value is selected, and the inductor 103 can be used as an antistatic device when a large value is selected.
In addition, with continued reference to fig. 1 and fig. 3, the communication terminal may further include a radio frequency amplifier 400 and a capacitor 900, wherein the radio frequency amplifier 400 may amplify signals, amplify different input powers and different power levels, output power to the first coaxial mount 500, and transmit the power through the antenna 800. The capacitor 900 comprises a first polar plate and a second polar plate which are insulated and arranged oppositely, the first polar plate is connected with the radio frequency amplifier 400, the second polar plate is connected with the third node 303, and the capacitor 900 is arranged between the radio frequency amplifier 400 and the third node 303 and can play a role in blocking direct current.
The second aspect of the present disclosure further provides a testing method, which is applied to the foregoing communication terminal, and the testing method includes the following steps: adjusting the switching device to a disconnection state, and testing the transmission power corresponding to the first calibration parameter output by the control chip 200; and adjusting the switching device to a closed state, and testing the transmitting power corresponding to the second calibration parameter output by the control chip 200.
Referring to fig. 4, taking the communication terminal as a mobile phone as an example, before the mobile phone leaves the factory, the main board of the mobile phone is calibrated in a wired manner, and then the first calibration parameter in the wired calibration process is written into the control chip 200, where the first calibration parameter can make the subsequent main board meet the 3GPP requirements when testing. And then assembling the whole machine, carrying out wireless consistency test and wireless calibration on the whole machine, controlling the SAR value of the whole machine within a standard range through a second calibration parameter, and writing the second calibration parameter into the control chip 200, wherein the second calibration parameter can enable the SAR of the subsequent whole machine during testing to meet the requirement.
Specifically, during the test, the mobile phone transmits with high power, the power chip 100 supplies power to the antenna switch 700 and the detection circuit 300, and the first node 301 is at a high level. The judgment is carried out through the corresponding level signal of the second node 302 in the detection circuit 300, when the fourth node 304 in the detection circuit 300 is at a high level and the second node 302 is a first level signal, it represents that the coaxial line 105 is not buckled, that is, the switch device is in an off state, the detection circuit 300 feeds back the first level signal of the second node 302 to the control chip 200, the control chip 200 calls a first calibration parameter and amplifies the signal through the radio frequency amplifier 400, the signal is transmitted to the first coaxial socket 500 on the mainboard, the test of the plate pole power transmission is completed, and the transmission power of the mainboard meets the 3GPP standard. The plate electrode power refers to the maximum power of the main plate.
When the fourth node 304 in the detection circuit 300 is at a low level and the second node 302 is a second level signal, it represents that the coaxial line 105 is in a buckled state, that is, the switch device is in a closed state, the detection circuit 300 feeds back the second level signal of the second node 302 to the control chip 200, the control chip 200 calls the second calibration parameter, and amplifies the signal by the radio frequency amplifier 400, the signal is transmitted to the antenna 800 through the coaxial line 105, the power transmission of the whole machine is completed, and the SAR value of the mobile phone meets the requirement.
Therefore, in the testing method, wired calibration and wireless calibration are respectively performed in advance before the delivery of the mobile phone, and the first calibration parameter and the second calibration parameter obtained in the calibration process are recorded into the control chip 200, when the subsequent mobile phone is tested, the level signal of the second node 302 of the detection circuit 300 is changed by changing the buckling state of the coaxial line 105, the level signal at the second node 302 can be fed back to the control chip 200, and the control chip 200 can correspondingly call the corresponding calibration parameter according to the corresponding level signal of the detection circuit 300, so that both the wireless test and the wired test can meet the testing requirements.
In the scheme, because two sets of calibration parameters are input in advance, the two sets of calibration parameters correspond to the test requirements of the wireless test and the wired test, no matter when the mainboard test or the whole machine test is carried out, the test type can be detected through the detection circuit 300, the detection circuit 300 transmits the level signal corresponding to the second node 302 to the control chip 200, and then the control chip 200 corresponds to the adjusted calibration parameters, so that when the mainboard test is carried out, the emission power of the mainboard naturally meets the requirements (namely, the 3GPP standard is met), or when the whole machine test is carried out, the SAR value of the mobile phone also can meet the standard range, and the damage to a human body is reduced.
Furthermore, the terms "first", "second", "third", "fourth", "fifth" are configured for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.
In the present disclosure, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
In the description herein, references to the description of the terms "some embodiments," "exemplary," etc. mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or exemplary is included in at least one embodiment or exemplary of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present disclosure have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present disclosure, and therefore all changes and modifications that are intended to be covered by the claims and the specification of this disclosure are within the scope of the patent disclosure.
Claims (10)
1. A communication terminal is characterized by comprising a main board and a switch device; the switch device has an open state and a closed state, and the mainboard comprises a power supply chip, a control chip and a detection circuit;
a first calibration parameter and a second calibration parameter are stored in the control chip, the first calibration parameter corresponds to the maximum transmitting power of the mainboard, and the second calibration parameter corresponds to the maximum transmitting power of the communication terminal;
the detection circuit comprises a first node, a second node and a third node, wherein the first node is connected with the output end of the power supply chip, the second node is connected with the control chip, and the third node is connected with the switching device; wherein,
when the switching device is in an off state, the detection circuit transmits a first level signal to the control chip through the second node so that the control chip can call and output the first calibration parameter;
when the switching device is in a closed state, the detection circuit transmits a second level signal to the control chip through the second node, so that the control chip can call and output the second calibration parameter.
2. The communication terminal of claim 1, wherein the detection circuit further comprises:
a fourth node;
a fifth node;
the two ends of the first resistor are respectively connected with the first node and the fourth node;
the two ends of the second resistor are respectively connected with the second node and the fifth node;
a third resistor, two ends of which are respectively connected with the third node and the fourth node;
and the transistor comprises a control end, a first end and a second end, wherein the control end is connected with the second node, the first end is grounded, and the second end is connected with the fourth node.
3. The communication terminal according to claim 2, wherein the third resistor has a smaller resistance value than the first resistor and the second resistor.
4. The communication terminal according to claim 3, wherein a ratio of the resistance value of the first resistor to the resistance value of the third resistor is in a range of 5 to 20.
5. The communication terminal of claim 2,
the first level signal is less than the second level signal.
6. A communication terminal according to claim 1, characterized in that it further comprises a small board provided with a ground terminal, which is connected to the third node via the switching device.
7. The communication terminal according to claim 6, wherein the switching device comprises a first coaxial socket, a second coaxial socket and a coaxial line, the first coaxial socket is disposed on the main board and connected to the third node, the second coaxial socket is disposed on the small board and connected to the ground terminal, and the coaxial line can be connected to or disconnected from the first coaxial socket and the second coaxial socket; wherein,
when the coaxial line is simultaneously connected with the first coaxial line seat and the second coaxial line seat, the switch device is in the closed state;
the switching device is in the open state when the coaxial line is disconnected from at least one of the first and second coaxial line holders.
8. The communication terminal according to claim 1, wherein the communication terminal further comprises:
a radio frequency amplifier;
the capacitor comprises a first polar plate and a second polar plate which are insulated and arranged oppositely, the first polar plate is connected with the radio frequency amplifier, the second polar plate is connected with the third node, and the capacitor is configured to block direct current.
9. The communication terminal of claim 7,
the small plate is also provided with an antenna switch and an inductor, the antenna switch is connected with the power supply chip, and two ends of the inductor are respectively connected with the grounding end and the second coaxial line seat;
the communication terminal further comprises an antenna, and the antenna is connected with the second coaxial line seat.
10. A test method applied to the communication terminal according to any one of claims 1 to 9, the test method comprising the steps of:
adjusting the switching device to a disconnection state, and testing the transmitting power corresponding to the first calibration parameter output by the control chip;
and adjusting the switching device to a closed state, and testing the transmitting power corresponding to the second calibration parameter output by the control chip.
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