JPS5976122U

JPS5976122U - AGC circuit

Info

Publication number: JPS5976122U
Application number: JP17119682U
Authority: JP
Inventors: 今川　敏幸
Original assignee: クラリオン株式会社
Priority date: 1982-11-12
Filing date: 1982-11-12
Publication date: 1984-05-23

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 drawings]

第１図および第２図は共に本考案を説明するための特性
図、第３図は本考案実施例を示すブロック図である。３・・・分岐回路、６・・・ＲＦ増幅回路、■・・・第
１のループ（第１のＡＧＣ回路）、■・・・第２のルー
プ（第２のＡＧＣ回路）、Ｑｌ、Ｑ２・・・トランジス
タ、Ｑ３・・・ＦＥＴ０1 and 2 are characteristic diagrams for explaining the present invention, and FIG. 3 is a block diagram showing an embodiment of the present invention. 3... Branch circuit, 6... RF amplifier circuit, ■... First loop (first AGC circuit), ■... Second loop (second AGC circuit), Ql, Q2 ...Transistor, Q3...FET0

Claims

[Claims for Utility Model Registration] 1. A part of the tuner is provided with a first AGC circuit and a second AGC circuit for an input signal, and when the input signal level increases, the first AGC circuit is operated first, and An AGC circuit characterized in that when the input signal level increases and the first AGC circuit reaches a saturation level, the second AGC circuit is operated. 2. The first AGC circuit and the second AGC circuit each include a first circuit control element and a second circuit control element, and when the output power button of the first circuit control element reaches the level 2. The AGC circuit according to claim 1, wherein the AGC circuit is configured to turn on two circuit control elements. 3. Utility model registration claim 1 or 2, characterized in that the first AGC circuit includes a branch circuit for branching the input signal into the first AGC circuit and the second AGC circuit. AGC circuit.