Controlled current producing differential circuit apparatus

Details Controlled current producing differential circuit apparatus Controlled current producing differential circuit apparatus

1988-03-18

1990-07-17

Paschall, M. H.

Amplifiers

With semiconductor amplifying device

Including particular biasing arrangement

323314, 323316, 330297, H03F 304

Patent

active

049423690

ABSTRACT:
A controlled current producing differential circuit apparatus for outputting a controlled stable current despite changes in a power supply voltage subject to unexpected fluctuation. The apparatus includes a control voltage supply source for supplying a control voltage in response to the power supply voltage, a reference voltage supply source responsive to the power supply voltage for supplying a predetermined reference voltage, and a differential circuit coupled to the control voltage supply source and the reference voltage supply source for outputting the controlled stable current in response to the difference between the control voltage and the reference voltage and for compensating for fluctuations in the power supply voltage.

REFERENCES:
patent: 3932768 (1976-01-01), Takahashi et al.
patent: 4352056 (1982-09-01), Cave et al.
patent: 4629972 (1986-12-01), Briner et al.
patent: 4704654 (1987-11-01), Aberle et al.
patent: 4779059 (1988-10-01), Taki et al.

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