JPS6223930B2 - - Google Patents
Info
- Publication number
- JPS6223930B2 JPS6223930B2 JP14568481A JP14568481A JPS6223930B2 JP S6223930 B2 JPS6223930 B2 JP S6223930B2 JP 14568481 A JP14568481 A JP 14568481A JP 14568481 A JP14568481 A JP 14568481A JP S6223930 B2 JPS6223930 B2 JP S6223930B2
- Authority
- JP
- Japan
- Prior art keywords
- transmission output
- section
- transmission
- output control
- signal
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
- Transmitters (AREA)
Description
【発明の詳細な説明】
本発明は送信機と受信機を備えた通信機におい
て、送信出力を安定に制御するようにした送信出
力制御回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmission output control circuit that stably controls transmission output in a communication device equipped with a transmitter and a receiver.
従来、第１図に示すような送信機１と受信機２
を備えた通信機において、送信出力を安定に制御
するためには、送信出力増幅部３とアンテナ切換
回路４との間に、送信出力の検出回路５を設け、
この検出回路５で検出した出力を送信出力制御部
６内の直流増幅器で適当な直流電圧に変換し、そ
の出力電圧により前記送信出力増幅部３へ帰還し
てその電源電圧を送信出力が大きいときは低く、
小さいときは高くなるように制御していた。な
お、図中、７は送信信号入力部、８は受信高周波
部、９は受信信号出力部、１０はLPF（ローパス
フイルタ）、１１はアンテナである。 Conventionally, a transmitter 1 and a receiver 2 as shown in FIG.
In order to stably control the transmission output in a communication device equipped with
The output detected by this detection circuit 5 is converted into an appropriate DC voltage by a DC amplifier in the transmission output control section 6, and the output voltage is fed back to the transmission output amplification section 3, and the power supply voltage is used when the transmission output is large. is low;
When it was small, it was controlled to be high. In the figure, 7 is a transmission signal input section, 8 is a reception high frequency section, 9 is a reception signal output section, 10 is an LPF (low pass filter), and 11 is an antenna.
このような従来の回路構成では、高出力で送信
をする場合、検出回路５での送信出力の検出量の
コントロールが難しく、安定に送信出力を制御す
ることができなかつた。例えば、検出回路５とし
て、送信出力信号ラインに微小容量を結合して検
出する方法では、その信号ラインのインピーダン
スに悪影響を与える欠点があつた。 With such a conventional circuit configuration, when transmitting at high output, it is difficult to control the amount of detected transmission output by the detection circuit 5, and it is not possible to stably control the transmission output. For example, a method in which a minute capacitance is coupled to a transmission output signal line as the detection circuit 5 for detection has the drawback of adversely affecting the impedance of the signal line.
本発明はこのような従来の問題点を解決するた
めになされたもので、高周波高出力に対する影響
の少ない受信機内に、検出回路と送信出力制御部
を設け、その出力で送信出力制御部を制御し、動
作の安定性を向上させたものである。 The present invention has been made to solve these conventional problems, and includes a detection circuit and a transmission output control section provided in a receiver that has little influence on high frequency and high output, and the output of which controls the transmission output control section. However, the stability of operation has been improved.
本発明の一実施例を第２図について説明する。 An embodiment of the present invention will be described with reference to FIG.
２０は送信機、２１は受信機で、これらの送信
機２０と受信機２１はアンテナ切換回路２２、
LPF（ローパスフイルタ）２３を介してアンテナ
２４に結合されている。 20 is a transmitter, 21 is a receiver, and these transmitter 20 and receiver 21 are connected to an antenna switching circuit 22,
It is coupled to an antenna 24 via an LPF (low pass filter) 23.
前記送信機２０は、送信信号入力部２５と送信
出力増幅部２６からなつている。また、受信機２
１は、受信高周波部２７と受信信号出力部２８の
他に、前記アンテナ切換回路２２における送信出
力の漏洩信号を検出するための検出回路２９と、
この検出信号を直流電圧に変換し、送信出力増幅
部２６の電源電圧を制御するための送信出力制御
部３０とを有する。 The transmitter 20 includes a transmission signal input section 25 and a transmission output amplification section 26. Also, receiver 2
1 includes, in addition to the reception high frequency section 27 and the reception signal output section 28, a detection circuit 29 for detecting a leakage signal of the transmission output in the antenna switching circuit 22;
It has a transmission output control section 30 for converting this detection signal into a DC voltage and controlling the power supply voltage of the transmission output amplification section 26.
このような構成において、送信時にアンテナ切
換回路２２が送信機２０側に接続されると、送信
信号入力部２５から送信出力増幅部２６を経て、
アンテナ切換回路２２、LPF２３を通りアンテナ
２４から送信される。このとき、アンテナ切換回
路２２では、送信信号が漏洩するが、このレベル
の低い個所での漏洩信号が検出回路２９で検出さ
れる。この検出回路２９の検出出力は、送信出力
制御部３０内の直流増幅器で直流電圧に変換さ
れ、この直流電圧で、送信出力増幅部２６の電源
電圧を制御する。つまり、送信出力が大きいとき
は電源電圧を低下させ、小さいときは上昇させ
る。 In such a configuration, when the antenna switching circuit 22 is connected to the transmitter 20 side during transmission, the signal is transmitted from the transmission signal input section 25 through the transmission output amplification section 26,
It passes through the antenna switching circuit 22 and LPF 23 and is transmitted from the antenna 24. At this time, the transmitted signal leaks in the antenna switching circuit 22, but the detection circuit 29 detects the leaked signal at a location where the level is low. The detection output of the detection circuit 29 is converted into a DC voltage by a DC amplifier in the transmission output control section 30, and the power supply voltage of the transmission output amplification section 26 is controlled by this DC voltage. That is, when the transmission output is large, the power supply voltage is lowered, and when it is small, it is increased.
本発明は上述のように、送信出力の検出回路と
送信出力制御部とを、高周波高出力の影響の少な
い受信機内に設置したので、送信出力信号ライン
のインピーダンスに悪影響を与えず、したがつて
動作の安定性を向上させることができる。 As described above, in the present invention, the transmission output detection circuit and the transmission output control section are installed in the receiver, which is less affected by high frequency and high output, so that the impedance of the transmission output signal line is not adversely affected. Operational stability can be improved.
第１図は従来の通信機のブロツク図、第２図は
本発明による通信機の一実施例を示すブロツク図
である。
１，２０……送信機、２，２１……受信機、
３，２６……送信出力増幅部、４，２２……アン
テナ切換回路、５，２９……検出回路、６，３０
……送信出力制御部、７，２５……送信信号入力
部、８，２７……受信高周波部、９，２８……受
信信号出力部、１０，２３……LPF、１１，２４
……アンテナ。
FIG. 1 is a block diagram of a conventional communication device, and FIG. 2 is a block diagram showing an embodiment of a communication device according to the present invention. 1, 20... transmitter, 2, 21... receiver,
3, 26... Transmission output amplification section, 4, 22... Antenna switching circuit, 5, 29... Detection circuit, 6, 30
... Transmission output control section, 7, 25 ... Transmission signal input section, 8, 27 ... Reception high frequency section, 9, 28 ... Reception signal output section, 10, 23 ... LPF, 11, 24
……antenna.
Claims (1)
信機と、受信高周波部と受信信号出力部からなる
受信機とをアンテナ切換回路で切換えて送信と受
信を可能とした通信機において、 該受信機内であつて該受信高周波部の前段に設
けられ該アンテナ切換回路において漏洩した送信
信号を検出するための検出回路と、 該受信機内に設けられ該検出回路の検出信号に
応じて送信出力を制御するための送信出力制御部
と、 からなることを特徴とする送信出力制御回路。 ２ 特許請求の範囲第１項記載において、送信出
力制御部は検出回路の検出信号を直流電圧に変換
する直流増幅器を具備してなる送信出力制御回
路。[Claims] 1. Communication that enables transmission and reception by switching between a transmitter consisting of a transmission signal input section and a transmission output amplification section and a receiver consisting of a reception high frequency section and a reception signal output section using an antenna switching circuit. a detection circuit provided in the receiver upstream of the reception high-frequency section for detecting a transmitted signal leaked in the antenna switching circuit; A transmission output control circuit comprising: a transmission output control section for controlling transmission output; and a transmission output control section for controlling transmission output. 2. The transmission output control circuit according to claim 1, wherein the transmission output control section includes a DC amplifier that converts a detection signal of the detection circuit into a DC voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14568481A JPS5847332A (en) | 1981-09-16 | 1981-09-16 | Control circuit of transmission output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14568481A JPS5847332A (en) | 1981-09-16 | 1981-09-16 | Control circuit of transmission output |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5847332A JPS5847332A (en) | 1983-03-19 |
| JPS6223930B2 true JPS6223930B2 (en) | 1987-05-26 |
Family
ID=15390691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14568481A Granted JPS5847332A (en) | 1981-09-16 | 1981-09-16 | Control circuit of transmission output |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5847332A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63152834U (en) * | 1987-03-27 | 1988-10-06 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7529526B2 (en) * | 2004-04-08 | 2009-05-05 | Christopher Brindle | Apparatus and method for detecting radio frequency transmission power levels |
-
1981
- 1981-09-16 JP JP14568481A patent/JPS5847332A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63152834U (en) * | 1987-03-27 | 1988-10-06 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5847332A (en) | 1983-03-19 |
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