公开(公告)号：US3714598A

公开(公告)日：1973-01-30

申请号：US3714598D

申请日：1971-03-22

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： WAKAI S ,  NABAE M

IPC: H03G3/20 ,  H03G3/30 ,  H03G3/34 ,  H04N5/53

CPC classification number: H04N5/53 ,  H03G3/3052 ,  H03G3/345

Abstract: An AGC amplifier having a Darlington pair as a noise gate circuit for preventing the development of unwanted AGC outputs due to noise pulses. The Darlington pair develops a larger overdrive with the same base current than if a single transistor is employed, so a longer storage time of the transistors results, lengthening the gate period. This makes available an AGC amplifier circuit with a noise gate circuit whose gate period is longer without using a capacitor, thereby providing a convenient means for application to monolithic integrated circuits.