A.C. potentiometer with bridge having voltage controllable devic

Details A.C. potentiometer with bridge having voltage controllable devic A.C. potentiometer with bridge having voltage controllable devic

1975-08-11

1976-06-22

Goldberg, Gerald

Electricity: power supply or regulation systems

Remote sensing

307251, 323 75E, G05F 156

Patent

active

039654109

ABSTRACT:
An a.c. potentiometer wherein the gain of a variable gain circuit is controlled by a d.c. reference signal and a d.c. input signal, the gain being adjusted to be proportional to the ratio of the d.c. input signal to the d.c. reference signal. An a.c. reference is added to the d.c. reference. Since the gain of the circuit is equal for both a.c. and d.c. input voltages, the a.c. signal at the circuit a.c. output terminals is proportional to the a.c. reference signal and the ratio of the d.c. input signal to the d.c. reference signal which defines the gain. Desired electrical isolation of the a.c. circuitry from the d.c. circuitry is achieved by means of input and output coupling transformers for the a.c. signals.

REFERENCES:
patent: 3435375 (1969-03-01), Miller, Jr.

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