Clarion Co

Toshio Kishida

Hiroshi Igarashi

Kenji Arima

Kunihiro Yoshizawa

An automatic linearity correcting circuit comprises a junction-type active element, a dual gate MOSFET, an AGC circuit to keep output signal from the dual gate MOSFET at a predetermined level and a correcting voltage applying circuit to convert AGC voltage to a voltage most suitable for linearity correction, so that output signal from the junction-type active element is applied to one of gates of the dual gate MOSFET, and correcting voltage from the correcting voltage applying circuit is applied to the other gate of the MOSFET.

Automatic linearity correcting circuit

AGC system for a television receiver having a keyed AGC circuit, a peak or average AGC circuit and a switching circuit between a video signal intermediate frequency amplifier circuit and an video signal detection circuit, wherein automatic gain control (AGC) for video signals is effected by the keyed AGC circuit, which is commuted by using the switching circuit after having had the peak or average AGC circuit operated at the switch-on moment of the power supply.

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Tokyo, Japan

Toshio Kishida