Direct current power supply

Details Direct current power supply Direct current power supply

1979-03-02

1981-11-10

Shoop, William M.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323237, 323267, 307 11, G05F 302

Patent

active

043000908

ABSTRACT:
Direct Current power supply for providing a relatively low stabilized d.c. voltage from a relatively high a.c. voltage primary power source without the use of a transformer. The d.c. value is developed across a variable impedance device coupled substantially in series with the current path established between the source of a.c. power and a functional load coupled to the source of a.c. power. Through effective control of the variable impedance so as to be at a minimum value, e.g. low impedance, through one half-cycle of the a.c. waveform and further to purposefully effect a high impedance through a small part of the second half-cycle whereupon it changes to a condition of low impedance, a stable unidirectional current flow is established in a secondary circuit which is filtered and results in a stabilized direct current power source well suited for supplying low demand circuits as typified by solid-state control circuits employing transistors and integrated circuits; microprocessors; low power amplifiers, oscillators, and timers; and other such devices.

REFERENCES:
patent: 3242416 (1966-03-01), White
patent: 3355650 (1967-11-01), Tolmie
patent: 3399333 (1968-08-01), Canter
patent: 3663943 (1972-05-01), Nakajima et al.
patent: 3790856 (1974-02-01), Hutchinson
patent: 3798470 (1974-03-01), Burns et al.
patent: 3878434 (1975-04-01), Voorhoeve
patent: 4118768 (1978-10-01), Wilson, Sr.

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