JPS60127020U

JPS60127020U - amplifier

Info

Publication number: JPS60127020U
Application number: JP1227684U
Authority: JP
Inventors: 八郎佐藤
Original assignee: 株式会社ケンウッド
Priority date: 1984-02-02
Filing date: 1984-02-02
Publication date: 1985-08-27

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図乃至第４図は従来の増幅器を示し、第１図は回路
図、第２図は該回路における出力段の電流波形図、第３
図は回路図、第４図は該回路にお　゛ける出力段の電流
波形図、第５図乃至第１２図は本考案に係る増幅器の実
施例を示し、第５図は基本的ブロック図、第６図は具体
的回路構成例を示す回路図、第７図は該回路における出
力段の電流波形図、第８図は従来の増幅器と本考案に係
る増゛幅器との（電力損失／最大出力）／（出力／最大
　−出力）特性比較図、第９図は第２の実施例を示す回
路図、第１０図は第３の実施例の概要を示すブロック図
、第１１図は該ブ爾ツク図の動作例を示す（バイアス電
流／出力）特性図、第１２図は第３の実施例の具体的構
成例を示す回路図である。１：出力段増幅回路、２：切り換え部、３：制御部、４
−：保持部。1 to 4 show conventional amplifiers, FIG. 1 is a circuit diagram, FIG. 2 is a current waveform diagram of the output stage in the circuit, and FIG.
FIG. 4 is a circuit diagram, FIG. 4 is a current waveform diagram of the output stage of the circuit, FIGS. 5 to 12 show embodiments of the amplifier according to the present invention, and FIG. 5 is a basic block diagram. FIG. 6 is a circuit diagram showing a specific circuit configuration example, FIG. 7 is a current waveform diagram of the output stage in the circuit, and FIG. (maximum output)/(output/maximum - output) characteristic comparison diagram, Fig. 9 is a circuit diagram showing the second embodiment, Fig. 10 is a block diagram showing an overview of the third embodiment, and Fig. 11 is a comparison diagram of the characteristics of the third embodiment. A (bias current/output) characteristic diagram showing an example of the operation of the block diagram, and FIG. 12 is a circuit diagram showing a specific example of the configuration of the third embodiment. 1: Output stage amplifier circuit, 2: Switching section, 3: Control section, 4
-: Holding part.

Claims

[Claims for Utility Model Registration] In a single-ended push-pull amplifier, a switching section for switching the bias voltage of an output stage amplifier circuit, and switching in the switching section according to the signal strength output from the output stage amplifier circuit. and a control unit for controlling the bias voltage to maintain the switching state to the high voltage side for a predetermined period of time. and a holding section, and is configured to increase the idling current of the output stage amplifier circuit by switching the bias voltage to a high voltage side when the signal strength exceeds a level. amplifier.