JPS6118644U

JPS6118644U - Transmission output control circuit

Info

Publication number: JPS6118644U
Application number: JP10093584U
Authority: JP
Inventors: 茂横須加
Original assignee: 日本電気株式会社
Priority date: 1984-07-04
Filing date: 1984-07-04
Publication date: 1986-02-03

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の送信出力制御回路の構成図、第２図は本
考案の一実施例の構成図である。１・・・・・・送信信号入力端子、２・・・・・・電力
増幅器、３・・・・・・送信信号出力端子、４ａ・・・
・・・第１の結合器、４ｂ・・・・・・第２の結合器、
５ａ・・・・・・第１の検波−器、５ｂ・・・・・・第
２の検疲器、６・・・・・・基準電圧発生器、７ａ・・
・・・・制御器、８・・・・・・出力制御信号入力端子
、９・・・・・・比較増幅器、ｌｅａ・・・・・・電源
電圧制御器、１１・・・・・・電源入力端子、１２ａ・
・・・・・第１のスイッチ回路、１２ｂ・・・・・・第
２のスイッチ回路、１２ｃ・・・・・・第３のスイッチ
回路、Ｒ１，Ｒ２，Ｒ３・・・・・・抵抗、Ｔｒ，Ｔ
ｒ２・・・・・・トランジスタ。FIG. 1 is a block diagram of a conventional transmission output control circuit, and FIG. 2 is a block diagram of an embodiment of the present invention. 1... Transmission signal input terminal, 2... Power amplifier, 3... Transmission signal output terminal, 4a...
...first coupler, 4b...second coupler,
5a...First wave detector, 5b...Second fatigue detector, 6...Reference voltage generator, 7a...
...controller, 8 ...output control signal input terminal, 9 ...comparison amplifier, lea ...power supply voltage controller, 11 ...power supply Input terminal, 12a・
...First switch circuit, 12b...Second switch circuit, 12c...Third switch circuit, R1, R2, R3...Resistance, Tr, T
r2...Transistor.

Claims

[Scope of utility model registration request]

a power amplification section, first and second detection circuits that detect the output of the power amplification section and convert it into a DC voltage, a preset reference voltage and a DC voltage from the first or second detection circuit; a comparator circuit that amplifies and outputs the error voltage by comparing the output voltage with the output voltage, a voltage variable circuit that determines the power supply voltage to the power amplifying section based on the output from the comparator circuit, and a voltage variable circuit that determines the power supply voltage to the power amplifying section based on the output from the comparator circuit; The DC voltage from the second detection circuit is inputted to the comparison circuit to control the power supply voltage to the power amplifying section determined by the voltage variable circuit to be low, and the DC voltage from the second detection circuit is controlled to be low during high output transmission. input to the comparator circuit and control the value of the DC voltage to be equal to the value of the DC voltage from the first detection circuit during low output transmission, so that the power supply voltage to the power amplification section becomes high. 1. A transmission output control circuit comprising: a control section for controlling the transmission output;