Regulation of current or voltage with PWM controller

Details Regulation of current or voltage with PWM controller Regulation of current or voltage with PWM controller

1995-03-21

1997-11-25

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Phase controlled switching using electronic tube or a three...

323242, G05F 140, G05F 1455

Patent

active

056916280

ABSTRACT:
A circuit for providing a periodic output having a regulated magnitude is derived from a periodic input source. A switch is serially connected to the input for periodically sampling the input at a sampling frequency which is much higher than the frequency of the periodic input, while the duty ratio of the sampling is modulated as an inverse function of the output magnitude. The pulse train of samples is filtered to remove the sampling frequency and its harmonics and the result is a regulated output which replicates the input waveform.

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Spec sheet for Unitrode Current Mode PWM Controller, pp. 5-186 to 5-191, dated Jun. 1993.

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