Amplification circuit and integrated circuit having such and con

Details Amplification circuit and integrated circuit having such and con Amplification circuit and integrated circuit having such and con

1999-04-28

2000-12-19

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including gain control means

330285, 330 86, H03G 312, H03G 310, H03F 136

Patent

active

061632198

ABSTRACT:
An amplification circuit includes an amplifying unit to which a signal supplied via an AC coupling capacitor is input, the amplifying unit starting an amplifying operation for the input signal when a potential level at an input portion of the amplifying unit reaches an operating threshold level from a predetermined low level, and a feedback resistor circuit, provided in a feedback line through which electric charge is fed back to the input portion of the amplifying unit, in which feedback resistor circuit a resistance value is controllable by a control signal supplied from an outside thereof.

REFERENCES:
patent: 3553490 (1971-01-01), Darrow
patent: 4216434 (1980-08-01), Wermuth
patent: 4450413 (1984-05-01), Fujibayashi
patent: 5703529 (1997-12-01), Ghaffaripour et al.

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