CN111343117A - Efficient amplitude modulation system and method - Google Patents
Efficient amplitude modulation system and method Download PDFInfo
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- CN111343117A CN111343117A CN201811554568.2A CN201811554568A CN111343117A CN 111343117 A CN111343117 A CN 111343117A CN 201811554568 A CN201811554568 A CN 201811554568A CN 111343117 A CN111343117 A CN 111343117A
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- preset
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/04—Modulator circuits; Transmitter circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/06—Demodulator circuits; Receiver circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/08—Amplitude regulation arrangements
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The invention provides a high-efficiency amplitude modulation system, which is used for solving the problems of poor linearity of the modulation characteristic of an amplitude modulation circuit and low efficiency in the prior art, and comprises the following components: the buck conversion circuit is electrically connected with the inverse E type power amplification circuit; the buck conversion circuit is used for receiving the preset modulation signal, converting the preset modulation signal and outputting a preset modulation conversion signal; the inverse E-type power amplifying circuit is used for receiving the square wave signal with the same frequency as the preset carrier wave and the preset modulation conversion signal output by the buck conversion circuit and outputting the preset carrier wave signal and the preset modulated wave signal corresponding to the preset conversion signal. By adopting the amplitude modulation system, the efficiency is high.
Description
Technical Field
The invention relates to the technical field of amplitude modulation, in particular to a high-efficiency amplitude modulation system and method.
Background
Transmission information is one of important contents of human life. The means of transmitting information are numerous. The use of radio technology for information transmission plays an extremely important role in these approaches. Radio communication, radio, television, navigation, radar, telemetry, etc., are all ways of transmitting a variety of different information using radio technology.
Broadcast and radio communications are transmitted using modulation techniques to add low frequency signals, called modulation signals, to high frequency signals, called carriers. Common continuous wave modulation methods include amplitude modulation and frequency modulation, wherein amplitude modulation is to change the amplitude of a carrier signal along with the amplitude of a modulation signal, and the frequency and response of the carrier are not changed. Amplitude modulation is a nonlinear frequency conversion process, generally carried out in class-C amplification stages, and is realized by matching nonlinear devices such as diodes or triodes and transformers, and the like, so that the circuit mostly works in an undervoltage region or keeps working in a critical or weak overvoltage state, the linearity of the modulation characteristic is poor, the efficiency is low, and the circuit is complex to realize.
Disclosure of Invention
In order to solve the problems, the invention provides a high-efficiency and high-efficiency amplitude modulation system and method based on a Buck conversion circuit and an inverse E-class amplification circuit.
In order to achieve the purpose, the efficient amplitude modulation system and the efficient amplitude modulation method adopt the following technical scheme:
an efficient amplitude modulation system, comprising: the buck conversion circuit is electrically connected with the inverse E type power amplification circuit;
the buck conversion circuit is used for receiving the preset modulation signal, converting the preset modulation signal and outputting a preset modulation conversion signal;
the inverse E-type power amplifying circuit is used for receiving the square wave signal with the same frequency as the preset carrier wave and the preset modulation conversion signal output by the buck conversion circuit and outputting the preset carrier wave signal and the preset modulated wave signal corresponding to the preset conversion signal.
A method for efficient amplitude modulation, comprising the steps of:
s1: receiving a preset modulation signal, converting the preset modulation signal through a buck conversion circuit, and outputting a preset modulation conversion signal;
s2: and sending the square wave signal with the same frequency as the preset carrier wave and the preset modulation conversion signal output by the buck conversion circuit to the inverse E-type power amplification circuit, and outputting the preset modulated wave signal corresponding to the preset carrier wave and the preset modulation conversion signal through the inverse E-type power amplification circuit.
The invention has the beneficial effects that:
(1) the buck conversion circuit and the inverse E-type power amplifier are used for signal conversion, and the circuit conversion efficiency is high.
(2) The buck conversion circuit can provide energy for the preset modulation signal in the conversion process of the preset modulation signal, increase the energy of the signal and prolong the transmission distance.
Drawings
FIG. 1 is a first schematic circuit diagram of the present efficient amplitude modulation system;
FIG. 2 is a second schematic circuit diagram of the present efficient amplitude modulation system;
fig. 3 is a flow chart of the high-efficiency amplitude modulation method.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Example one
The embodiment provides a high-efficiency amplitude modulation system, so as to solve the problems of poor modulation characteristic linearity and low efficiency in the prior art, which utilize non-linear frequency conversion, as shown in fig. 1 to 2:
the system comprises: the buck conversion circuit is electrically connected with the inverse E type power amplification circuit;
the buck conversion circuit is used for receiving the preset modulation signal, converting the preset modulation signal and outputting a preset modulation conversion signal;
the inverse E-type power amplifying circuit is used for receiving the square wave signal with the same frequency as the preset carrier wave and the preset modulation conversion signal output by the buck conversion circuit and outputting the preset carrier wave signal and the preset modulated wave signal corresponding to the preset conversion signal.
As shown in fig. 1, after the preset modulation signal is converted by the buck conversion circuit, the common mode value of the preset modulation conversion signal changes relative to the preset modulation signal, the preset modulation conversion signal is used as the input of the inverse class-E power amplifier, the square wave signal with the same frequency as the preset carrier is used as the switch input signal of the inverse class-E power amplifier, and the preset modulated wave signal is output by the inverse class-E power amplifier.
Further, as a preferred implementation manner, the buck conversion circuit provided in this embodiment includes: as shown in fig. 2, when the preset modulation signal is a sine wave modulation signal with a preset frequency, the sine wave modulation signal is modulated by the PWM circuit of the buck conversion circuit to generate a preset first conversion signal with the same amplitude and different frequencies; or the sine wave modulation signal is modulated by a PFM circuit of the buck conversion circuit to generate a preset first conversion signal with different amplitudes and the same frequency;
the preset first conversion signal passes through an LC low-pass filter circuit, and a sinusoidal signal with a common mode value different from that of the preset modulation signal is output, namely the preset modulation conversion signal.
The preset modulation conversion signal generated after conversion and the square wave signal with the same frequency as the preset carrier wave are respectively used as a signal input signal and a switch signal of the inverse E-type power amplifier, the amplitude modulation process is completed through the inverse E-type power amplifier, and the preset modulated wave signal is output.
In the high-efficiency amplitude modulation system provided by this embodiment, after the preset modulation signal is first converted by the buck circuit, the common mode value of the preset modulation conversion signal changes relative to the preset modulation signal; then, the inverse E-type power amplifying circuit is used as a load of the buck circuit to be connected, then a square wave signal with the same frequency as a preset carrier wave is used as a switch input signal of the inverse E-type power amplifying circuit, under an ideal condition, the buck conversion circuit and the inverse E-type power amplifier have no energy consumption element, the circuit conversion efficiency is up to 100%, and the efficiency is high; and the buck conversion circuit can provide energy for a preset modulation signal in the signal conversion process, increase the energy of the signal and prolong the transmission distance.
Example two
The embodiment provides an efficient amplitude modulation method, which is used for solving the problems of complex amplitude modulation steps, poor modulation effect and low amplitude modulation efficiency in the prior art. As shown in fig. 3, the method comprises the steps of:
s1: receiving a preset modulation signal, converting the preset modulation signal through a buck conversion circuit, and outputting a preset modulation conversion signal;
s2: and sending the square wave signal with the same frequency as the preset carrier wave and the preset modulation conversion signal output by the buck conversion circuit to the inverse E-type power amplification circuit, and outputting the preset modulated wave signal corresponding to the preset carrier wave and the preset modulation conversion signal through the inverse E-type power amplification circuit.
Further, as a preferred implementation manner, the buck conversion circuit provided in this embodiment includes: a PWM circuit or a PFM circuit, an LC filter circuit;
firstly, pulse modulation is carried out on a received preset modulation signal through a pulse modulation circuit of the buck conversion circuit, and a preset first conversion signal is output;
the pulse modulation comprises the steps that pulse width modulation is carried out on a preset modulation signal through a PWM circuit of a pulse modulation circuit or pulse frequency modulation is carried out on the preset modulation signal through a PFM circuit of the pulse modulation circuit; and then outputting corresponding preset first conversion signals with the same amplitude and different frequencies or outputting corresponding preset first conversion signals with different amplitudes and different frequencies.
After the preset first conversion signal is output, the preset first conversion signal is subjected to low-pass filtering through an LC (inductance-capacitance) filtering circuit of the buck conversion circuit, and a preset modulation conversion signal is output.
And sending the square wave signal with the same frequency as the preset carrier wave and the preset modulation conversion signal output by the buck conversion circuit to the inverse E-type power amplification circuit, and outputting the preset modulated wave signal corresponding to the preset carrier wave and the preset modulation conversion signal through the inverse E-type power amplification circuit.
The high-efficiency amplitude modulation method is adopted, and the amplitude modulation efficiency is high.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (2)
1. An efficient amplitude modulation system, comprising: the buck conversion circuit is electrically connected with the inverse E type power amplification circuit;
the buck conversion circuit is used for receiving the preset modulation signal, converting the preset modulation signal and outputting a preset modulation conversion signal;
the inverse E-type power amplifying circuit is used for receiving the square wave signal with the same frequency as the preset carrier wave and the preset modulation conversion signal output by the buck conversion circuit and outputting the preset carrier wave signal and the preset modulated wave signal corresponding to the preset conversion signal.
2. A method for efficient amplitude modulation, comprising the steps of:
s1: receiving a preset modulation signal, converting the preset modulation signal through a buck conversion circuit, and outputting a preset modulation conversion signal;
s2: and sending the square wave signal with the same frequency as the preset carrier wave and the preset modulation conversion signal output by the buck conversion circuit to the inverse E-type power amplification circuit, and outputting the preset modulated wave signal corresponding to the preset carrier wave and the preset modulation conversion signal through the inverse E-type power amplification circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811554568.2A CN111343117A (en) | 2018-12-18 | 2018-12-18 | Efficient amplitude modulation system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811554568.2A CN111343117A (en) | 2018-12-18 | 2018-12-18 | Efficient amplitude modulation system and method |
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| CN111343117A true CN111343117A (en) | 2020-06-26 |
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Citations (4)
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|---|---|---|---|---|
| CN1976544A (en) * | 2005-11-29 | 2007-06-06 | 精工爱普生株式会社 | Capacitive load driving circuit, electrostatic transducer, ultrasonic speaker |
| JP2007215152A (en) * | 2006-02-08 | 2007-08-23 | Beyond Innovation Technology Co Ltd | Control circuit, load system making practical use of it, and modulatable triangular wave generator |
| US20100013554A1 (en) * | 2008-07-16 | 2010-01-21 | Samsung Electronics Co., Ltd | Switching power amplifier and method of controlling the same |
| CN209105211U (en) * | 2018-12-18 | 2019-07-12 | 宁波德晶元科技有限公司 | A kind of efficient amplitude modulation system |
-
2018
- 2018-12-18 CN CN201811554568.2A patent/CN111343117A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1976544A (en) * | 2005-11-29 | 2007-06-06 | 精工爱普生株式会社 | Capacitive load driving circuit, electrostatic transducer, ultrasonic speaker |
| JP2007215152A (en) * | 2006-02-08 | 2007-08-23 | Beyond Innovation Technology Co Ltd | Control circuit, load system making practical use of it, and modulatable triangular wave generator |
| US20100013554A1 (en) * | 2008-07-16 | 2010-01-21 | Samsung Electronics Co., Ltd | Switching power amplifier and method of controlling the same |
| CN209105211U (en) * | 2018-12-18 | 2019-07-12 | 宁波德晶元科技有限公司 | A kind of efficient amplitude modulation system |
Non-Patent Citations (5)
| Title |
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| DALVIR K. SAINI: "Buck DC-AC converter using gallium-nitride FETs for amplitude-modulated class-E RF power amplifiers", IECON 2015 - 41ST ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY, pages 1 - 6 * |
| 倪春: "宽频带逆E类功率放大器的设计", 2015年全国微波毫米波会议论文集, pages 1 - 3 * |
| 周治良;程丰;郑丽娜;: "一种低电平调幅器设计", 电子测量技术, no. 05 * |
| 张维;董云峰;夏云波;: "关于振幅调制特性的研究", 现代电子技术, no. 13 * |
| 杨洋: "《高级维修电工理论教程》", 苏州大学出版社, pages: 113 - 115 * |
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