Pulse width modulation circuit

Details Pulse width modulation circuit Pulse width modulation circuit

1991-07-01

1992-05-12

Mis, David

Modulators

Pulse or interrupted continuous wave modulator

Pulse width modulator

318599, H03K 708, G05B 1128

Patent

active

051131587

ABSTRACT:
A pulse width modulation circuit includes an operation unit which generates a compensation signal based on the product of a deviation of an input signal from a first reference value and a deviation of a power supply voltage from a second reference. A level change unit changes the level of at least one of an error signal from an error amplifier and a reference wave signal generated by a reference wave signal generator in accordance with the compensation signal so that a relative level defined by a level difference between the error signal and the reference wave signal changes in accordance with the compensation signal. The pulse width modulation circuit also includes a unit for comparing the level of the error signal and the level of the reference wave signal having a changed relative level with each other and for generating a pulse width modulated signal based on a comparison result.

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