Frequency stabilized single-ended regulated converter circuit

Electricity: power supply or regulation systems – Remote sensing

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323DIG1, 323 17, 331109, 331112, 321 18, H02M 720

Patent

active

039899950

ABSTRACT:
In a typical self-oscillating, single-ended converter that is pulse width modulated to regulate the output signal, duty cycle changes to stabilize the output signal cause the switching frequency of the converter to vary.
The switching frequency of the single-ended converter disclosed herein is stabilized by controlling the on and off durations of the switching device in an inverse proportional relationship to each other. The relation is controlled by adjusting the charging threshold of a timer circuit controlling the conducting interval of the switching devices in response to a voltage regulation error signal which controls the nonconducting interval thus limiting the total period of the switching device to a fixed interval.

REFERENCES:
patent: 3515974 (1970-06-01), Stich
patent: 3638096 (1972-01-01), Judd et al.
patent: 3675159 (1972-07-01), Judd et al.
patent: 3678412 (1972-07-01), Spies
patent: 3889173 (1975-06-01), Klusmann et al.

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