Mixer/amplifier circuit

Details Mixer/amplifier circuit Mixer/amplifier circuit

1985-11-20

1986-12-30

Mullins, James B.

Amplifiers

Combined with automatic amplifier disabling switch means

330147, 455144, 455188, 455333, H03F 319

Patent

active

046331883

ABSTRACT:
A mixer/amplifier circuit for selectively mixing a first input signal with a local oscillator signal or amplifying a second input signal. The mixer/amplifier circuit includes a transistor, a first circuit arrangement responsive to a first switching signal for enabling the transistor to operate as a grounded-base transistor to amplify the second input signal supplied to the emitter thereof, and a second circuit arrangement responsive to a second switching signal for enabling the transistor to operate as a grounded-emitter transistor to mix the first input signal supplied to the base thereof with the local oscillator.

REFERENCES:
patent: 3482178 (1969-12-01), Habian
patent: 3694756 (1972-09-01), Carlson
patent: 3727140 (1973-04-01), Nieto et al.
patent: 3949306 (1976-04-01), Watanabe et al.
patent: 4160953 (1979-07-01), Matsuura et al.

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