Feedback loop gain compensation for a switched resistor regulato

Details Feedback loop gain compensation for a switched resistor regulato Feedback loop gain compensation for a switched resistor regulato

1988-11-08

1990-08-07

Beha, Jr., William H.

Electricity: power supply or regulation systems

Output level responsive

Using an impedance as the final control device

323288, 323354, 363 89, G05F 146

Patent

active

049471023

ABSTRACT:
A switched resistor regulator is constructed whose duty cycle response is nonlinear with small changes in input control voltage. Specifically, the response of a pulse-width modulator is made to increase less than linearly with small changes in input control voltage. In a preferred embodiment, the pulse-width modulator is altered by comparing the input control voltage with a nonlinear reference signal, rather than the substantially linear reference signal which is used in prior art pulse-width modulators. Specifically, the nonlinear reference signal may be generated by a nonlinear reference voltage circuit, such as an RC charging circuit, or such as a D/A converter controlled by a clocked programmable microprocessor.

REFERENCES:
patent: 4237405 (1980-12-01), Kellis
patent: 4668906 (1987-05-01), Ekstrand
patent: 4719404 (1988-01-01), Ekstrand
patent: 4814966 (1989-03-01), Ekstrand

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