Switching regulator with independent feedback path filter

Details Switching regulator with independent feedback path filter Switching regulator with independent feedback path filter

1980-05-27

1981-11-03

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

307150, 323286, 328258, 455343, H04N 318

Patent

active

042988926

ABSTRACT:
A switching regulator for a television display apparatus includes a controllable switch coupled to a source of unregulated direct voltage. The switch is operated at the deflection rate to produce a pulsating direct voltage. A filter including a series choke and a shunt capacitor has its input coupled to the switch for filtering the pulsating direct voltage to form a direct voltage for operating the television display apparatus. An integrator has its input coupled to the input of the filter for averaging the pulsating direct voltage.
A feedback voltage control circuit has an input coupled to the integrator and an output coupled to a control electrode of the controllable switch for maintaining the average of the pulsating direct voltage constant over a wide range of unregulated direct voltage and load current variations.

REFERENCES:
patent: 3873846 (1975-03-01), Morio et al.
patent: 3931567 (1976-01-01), Kostecki
patent: 4118739 (1978-10-01), Umehara
R. J. Apfel, "Regulators To Switch or Not?", Electronics Products Magazine, pp. 39-45, Aug. 1977.
S. Wahnfried, "Pulse-controlled Constant Voltage Device", Elektronic, No. 11, pp. 359-360, 1968.
"The Control Transistor In Switching", AEG-Mitteilungen 50, 1960.

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