AGC CIRCUIT

PURPOSE:To prevent storage of electric charge in a rectifier capacitor of an AGC circuit by connecting an output of a power supply detecting circuit to an AGC control circuit and using an output of the AGC control circuit so as to control the rectifier circuit in the AGC circuit. CONSTITUTION:Transi...

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Bibliographic Details
Main Author KUWABARA KAZUMI
Format Patent
LanguageEnglish
Published 14.11.1986
Subjects
BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRICITY
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Summary:PURPOSE:To prevent storage of electric charge in a rectifier capacitor of an AGC circuit by connecting an output of a power supply detecting circuit to an AGC control circuit and using an output of the AGC control circuit so as to control the rectifier circuit in the AGC circuit. CONSTITUTION:Transistors 37, 38 are conducted during a period T when a waveform at application of power detected by the power supply detecting circuit 25 and no electric charge is stored in the rectifier capacitor 19. Thus, in setting the period T longer slightly than the DC voltage fluctuation (leading of amplifier circuit) time of an amplifier circuit 4 at power power application and interruption, the storage of the electric charge into the rectifier capacitor 19 attended with an output DC voltage fluctuation of the amplifier circuit 4 at power application and interruption, and malfunction such that the AGC circuit is operative independently of the input signal level is prevent at application of power.
Bibliography:Application Number: JP19850097717