Amplification gain adjusting circuit

Details Amplification gain adjusting circuit Amplification gain adjusting circuit

1986-07-18

1988-06-28

Wan, Gene

Amplifiers

With semiconductor amplifying device

Including gain control means

330279, H03G 310

Patent

active

047542322

ABSTRACT:
An amplification gain adjusting circuit in which the gain of an AC amplifier is controlled by a voltage dividing series connection of two resistors. One of the resistors is selectively shorted by a switching transistor. The DC bias of the switching transistor is set to prevent current flow through the base of the switching transistor at high AC levels.

REFERENCES:
patent: 4155048 (1979-05-01), Kabayama

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