Bias circuit

Details Bias circuit Bias circuit

1996-06-14

1998-07-21

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327531, 327557, 333 32, H01J 1982

Patent

active

057839654

ABSTRACT:
A transistor bias circuit which achieves stable operation in a multistage-connected amplifier circuit or in a compound circuit is formed, for example, by a transistor amplifier and a mixer. The transistor bias circuit, which establishes the operating point of a transistor, has an input biasing circuit which is connected to a signal input terminal of the transistor and which applies a bias current to this input terminal from a power supply. The input biasing circuit has an input frequency selection unit which passes an AC input signal input to the transistor signals input terminal within a prescribed frequency band, and which attenuates an AC input signal input to the transistor signal input terminal outside the prescribed frequency band.

REFERENCES:
patent: 4410864 (1983-10-01), Muterspaugh et al.
patent: 4476446 (1984-10-01), Blight
patent: 4812686 (1989-03-01), Morse
patent: 5309124 (1994-05-01), Cazaux et al.
patent: 5357148 (1994-10-01), Rotay
patent: 5578961 (1996-11-01), Fajen et al.

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