Differential transconductor stage dynamically controlled by the

Details Differential transconductor stage dynamically controlled by the Differential transconductor stage dynamically controlled by the

1993-09-15

1998-03-10

Sikes, William L.

Amplifiers

With semiconductor amplifying device

Including gain control means

327312, 327530, H03G 312

Patent

active

057266042

ABSTRACT:
The dynamic range of operation of a differential transconductance input stage is reduced when the amplitude of the input signal decreases, thus reducing the level of the noise that is generated by the input stage. A DC signal representative of the sensed amplitude of the input signal is employed for either reducing the value of a common, emitter-degenerating resistance or of the bias current that is forced in the two branches of the differential input stage.

REFERENCES:
patent: 3806823 (1974-04-01), Marek
patent: 4378370 (1983-03-01), Harford
patent: 5142242 (1992-08-01), Schaffer

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