Power supply/auto-clear circuit

Details Power supply/auto-clear circuit Power supply/auto-clear circuit

1981-02-18

1982-09-21

Pellinen, A. D.

Electric power conversion systems

Current conversion

With starting arrangement

323901, H02M 702

Patent

active

043510213

ABSTRACT:
A power supply circuit includes a rectifier for converting an alternating voltage to a DC voltage for driving a single chip LSI microcomputer control system in, for example, a microwave oven. A switching circuit is included in the power supply circuit for developing an output DC voltage only after the DC voltage derived from the rectifier reaches a preselected level. The switching circuit includes large current transistors connected in the Darlington fashion, whereby the power supply circuit develops the output DC voltage with a short leading transient period which is required for developing an auto-clear signal in the single chip LSI microcomputer control system.

REFERENCES:
patent: 3444481 (1969-05-01), Fisher
patent: 4017787 (1977-04-01), Hara et al.
IC Power Supply, Elektor, vol. 3, No. 2, Feb. 1977, pp. 26-30.

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