JPS631465Y2 - - Google Patents
Info
- Publication number
- JPS631465Y2 JPS631465Y2 JP1980188330U JP18833080U JPS631465Y2 JP S631465 Y2 JPS631465 Y2 JP S631465Y2 JP 1980188330 U JP1980188330 U JP 1980188330U JP 18833080 U JP18833080 U JP 18833080U JP S631465 Y2 JPS631465 Y2 JP S631465Y2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- frequency
- received signal
- signal strength
- frequency characteristic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 description 3
- 230000010356 wave oscillation Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Landscapes
- Transceivers (AREA)
- Noise Elimination (AREA)
- Transmitters (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
この考案は、遠隔地における信号受信時のよう
にＳ／Ｎが悪い受信領域では、信号周波数の帯域
幅を自動的に狭くして了解度に向上を図るように
した周波数特性自動調整回路付きの無線装置に関
する。[Detailed description of the invention] [Industrial application field] This invention automatically narrows the signal frequency bandwidth in reception areas where the S/N is poor, such as when receiving signals in remote areas, to improve intelligibility. The present invention relates to a wireless device with an automatic frequency characteristic adjustment circuit which is designed to improve the characteristics of the wireless device.
従来の無線装置においては、受信時のＳ／Ｎ条
件と、信号の音質とは各別に考慮され、Ｓ／Ｎ条
件の如何に拘らず同一周波数特性で受信するよう
にされていた。 In conventional wireless devices, the S/N condition at the time of reception and the sound quality of the signal are considered separately, and the signal is received with the same frequency characteristics regardless of the S/N condition.
しかしながら、このような従来の無線装置で
は、Ｓ／Ｎが低下したとき、雑音成分が比較的広
い周波数帯域に亘つて増幅されてしまうために、
了解度が極めて悪くなつてしまうという問題点が
あつた。 However, in such conventional wireless devices, when the S/N decreases, noise components are amplified over a relatively wide frequency band.
There was a problem that the intelligibility became extremely poor.
この考案は、このような従来の問題点に着目し
てなされたもので、送信装置の可聴周波数の伝送
線路に、受信信号強度が小になるにつれて周波数
帯域幅が小になるような周波数特性自動調整回路
を介在させ、該送信装置には受信信号強度を記憶
させ周波数特性自動調整回路を制御するメモリ回
路を装備させることにより上記問題点を解決する
ことを目的としている。 This idea was created by focusing on these conventional problems.The audio frequency transmission line of the transmitter has an automatic frequency characteristic that reduces the frequency bandwidth as the received signal strength decreases. The present invention aims to solve the above-mentioned problems by interposing an adjustment circuit and equipping the transmitter with a memory circuit that stores the received signal strength and controls the frequency characteristic automatic adjustment circuit.
以下この考案を送・受信装置を備えたAM、ま
たはFM帯における図の実施例に基づいて具体的
に説明する。 This invention will be specifically explained below based on the embodiment shown in the figure in the AM or FM band equipped with a transmitting/receiving device.
まず構成を説明すると、図において符号Ｕは無
線装置にして、この無線装置には、受信装置RX
と、送信装置TXとが装備されている。 First, to explain the configuration, in the figure, reference numeral U indicates a wireless device, and this wireless device includes a receiving device RX.
and a transmitter TX.
そして、受信装置RX側においては送受兼用の
アンテナANTが高周波増幅回路HF・AMPに連
なり、この高周波増幅回路HF・AMPの後段に
検波回路DETが接続されている。そしてこの検
波回路DETに周波数特性自動調整回路U1′を含む
可聴周波数信号の伝送線路ｌが連ねてある。 On the receiving device RX side, an antenna ANT for transmitting and receiving is connected to a high frequency amplifier circuit HF/AMP, and a detection circuit DET is connected to the rear stage of the high frequency amplifier circuit HF/AMP. A transmission line l for an audio frequency signal including an automatic frequency characteristic adjustment circuit U 1 ' is connected to this detection circuit DET.
なお、符号AF・AMPは低周波増幅回路、SP
はスピーカ、U2はシグナルメータである。 In addition, the symbol AF/AMP is a low frequency amplification circuit, SP
is the speaker and U 2 is the signal meter.
一方、送信回路TX側においては、マイクMC
およびアンプAMPに連なる可聴周波数信号の伝
送線路ｌに周波数特性自動調整回路U1が介在さ
れている。周波数特性自動調整回路U1には、受
信信号強度を記憶するメモリ回路U3が接続され
ている。そして、周波数特性自動調整回路U1の
出力端が搬送波発振回路U4の出力端と共通接続
され、この共通接続点が励振回路U5、および送
信段U6に順次連なり、送信段U6にアンテナＡが
接続されている。送信段U6には出力アンプ等が
装備され、またアンテナＡは送信装置作動時には
送信装置TX側に切換えられる。 On the other hand, on the transmitter circuit TX side, the microphone MC
A frequency characteristic automatic adjustment circuit U 1 is interposed in the audio frequency signal transmission line 1 connected to the amplifier AMP. A memory circuit U 3 that stores received signal strength is connected to the frequency characteristic automatic adjustment circuit U 1 . The output end of the frequency characteristic automatic adjustment circuit U 1 is commonly connected to the output end of the carrier wave oscillation circuit U 4 , and this common connection point is sequentially connected to the excitation circuit U 5 and the transmission stage U 6 , and the output end of the frequency characteristic automatic adjustment circuit U 1 is connected to the output end of the carrier wave oscillation circuit U 4 . Antenna A is connected. The transmitter stage U 6 is equipped with an output amplifier, etc., and the antenna A is switched to the transmitter TX side when the transmitter is in operation.
周波数特性自動調整回路U1は、メモリ回路U3
で記憶された検波出力信号の大小、つまり可聴周
波数信号の受信信号強度の大小に応じて周波数帯
域幅を自動的に変化させるもので、検波信号を積
分する積分回路（図示せず）が備えられて、この
積分信号レベルが小になるにつれて周波数帯域幅
も小になるようにリニアに変化させる。 Frequency characteristic automatic adjustment circuit U 1 is connected to memory circuit U 3
This device automatically changes the frequency bandwidth according to the magnitude of the detected output signal stored in the detector, that is, the magnitude of the received signal strength of the audio frequency signal, and is equipped with an integrating circuit (not shown) that integrates the detected signal. Then, as the integrated signal level decreases, the frequency bandwidth also decreases linearly.
次に動作を説明する。 Next, the operation will be explained.
送信装置TXの作動を述べると、送信目的地点
から遠隔の地にある場合、まず、この遠隔地にあ
る相手側の送信信号を受信し、この受信信号強度
をメモリ回路U3に記憶させる。そして、この記
憶された受信信号強度により周波数特性自動調整
回路U1を制御し、受信信号強度が小なる場合に
は信号帯域幅を小にして、これを搬送波にのせて
送信する。 To describe the operation of the transmitting device TX, when it is located at a remote location from the transmission destination point, it first receives a transmitted signal from the other party located at this remote location, and stores the strength of this received signal in the memory circuit U3 . Then, the frequency characteristic automatic adjustment circuit U1 is controlled based on the stored received signal strength, and when the received signal strength is small, the signal bandwidth is made small and this is transmitted on a carrier wave.
したがつて目的地点における相手側（受信側）
においては受信信号強度が小であるにも拘らず比
較的良好なＳ／Ｎ状態で送信装置TXからの送信
信号を受信聴取をすることができる。 Therefore, the other party (receiving party) at the destination point
Although the received signal strength is low, it is possible to receive and listen to the transmitted signal from the transmitter TX in a relatively good S/N condition.
また、上記実施例においては、AMまたはFM
波帯の場合について述べたが、この考案はSSB方
式の無線装置にも適用できるものである。また、
SSB方式に適用した場合には周波数帯域幅のみな
らず、送信装置においては信号強度に応じて波形
の圧縮度もリニアに変化させれば、了解度は一層
向上するものである。 In addition, in the above embodiment, AM or FM
Although the case of the wave band has been described, this invention can also be applied to SSB type wireless equipment. Also,
When applied to the SSB method, intelligibility can be further improved by linearly changing not only the frequency bandwidth but also the degree of waveform compression in the transmitter according to the signal strength.
以上詳述したようにこの考案によれば、送信装
置の可聴周波数の伝送線路に、受信信号強度を記
憶するメモリ回路の制御により、受信信号強度が
小になるにつれて周波数帯域幅が小になるような
周波数特性自動調整回路を介在させたから、遠隔
地点など受信信号強度が小なる地点においても、
Ｓ／Ｎの良好な状態で、即ち了解度の良い状態で
信号聴取をなし得るという効果が得られる。 As detailed above, according to this invention, the frequency bandwidth is reduced as the received signal strength decreases by controlling the memory circuit that stores the received signal strength in the audio frequency transmission line of the transmitter. Because we have included a frequency characteristic automatic adjustment circuit, even in remote locations and other locations where the received signal strength is low,
The effect is that the signal can be heard with good S/N ratio, that is, with good intelligibility.
図はこの考案に係る周波数自動調整回路付き無
線装置の実施例を示すブロツク回路図である。
ANT……アンテナ、HF・AMP……高周波増
幅回路、DET……検波回路、RX……受信装置、
AMP……アンプ、MC……マイク、TX……送信
装置、Ｕ……無線装置、U1，U1′……周波数特性
自動調整回路、U2……シグナルメータ、U3……
メモリ回路、U4……搬送波発振回路、U5……励
振回路、U6……送信段、ｌ……可聴周波数信号
の伝送線路。
The figure is a block circuit diagram showing an embodiment of a wireless device with an automatic frequency adjustment circuit according to the invention. ANT...Antenna, HF/AMP...High frequency amplification circuit, DET...Detection circuit, RX...Receiving device,
AMP...Amplifier, MC...Microphone, TX...Transmitter, U...Radio device, U1 , U1 '...Frequency characteristic automatic adjustment circuit, U2 ...Signal meter, U3 ...
Memory circuit, U4 ...carrier wave oscillation circuit, U5 ...excitation circuit, U6 ...transmission stage, l...transmission line for audio frequency signals.
Claims (1)
いて、受信装置よりの可聴周波数信号の受信信号
強度を記憶するメモリ回路と、該回路により制御
されて前記受信信号強度が小なるにつれて周波数
帯域幅が小になるように前記受信信号強度に応じ
て周波数特性を変化する周波数特性自動調整回路
とを送信装置の可聴周波数信号の伝送線路に設け
たことを特徴とする周波数特性自動調整回路付き
無線装置。 A wireless device having both a transmitting device and a receiving device includes a memory circuit that stores the received signal strength of an audio frequency signal from the receiving device, and a frequency bandwidth that is controlled by the circuit to decrease as the received signal strength decreases. 1. A wireless device with an automatic frequency characteristic adjustment circuit, characterized in that a frequency characteristic automatic adjustment circuit that changes the frequency characteristic according to the received signal strength so as to be provided in a transmission line of an audio frequency signal of a transmitting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980188330U JPS631465Y2 (en) | 1980-12-30 | 1980-12-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980188330U JPS631465Y2 (en) | 1980-12-30 | 1980-12-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57113543U JPS57113543U (en) | 1982-07-14 |
| JPS631465Y2 true JPS631465Y2 (en) | 1988-01-14 |
Family
ID=29991810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980188330U Expired JPS631465Y2 (en) | 1980-12-30 | 1980-12-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS631465Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995001674A1 (en) * | 1993-06-30 | 1995-01-12 | Shintom Co., Ltd. | Radio receiver |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5374816A (en) * | 1976-12-15 | 1978-07-03 | Nec Corp | Receiver |
| JPS5428317B2 (en) * | 1975-06-04 | 1979-09-14 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5428317U (en) * | 1977-07-27 | 1979-02-24 |
-
1980
- 1980-12-30 JP JP1980188330U patent/JPS631465Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5428317B2 (en) * | 1975-06-04 | 1979-09-14 | ||
| JPS5374816A (en) * | 1976-12-15 | 1978-07-03 | Nec Corp | Receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57113543U (en) | 1982-07-14 |
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