Adapter for field signals of computers, microprocessor systems o

Details Adapter for field signals of computers, microprocessor systems o Adapter for field signals of computers, microprocessor systems o

1984-04-05

1986-03-18

Wong, Peter S.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

323224, 323266, 363 89, H02M 3335

Patent

active

045772673

ABSTRACT:
Adapter for field signals of computers, microprocessors systems or the like digital electronic circuits. The adapter receives either AC or DC signals, from external or field sources or from computers, microprocessor systems of the like digital electronic circuits, and provides AC or DC control voltages to external or field controls or to computers, microprocessor systems or the like digital electronic circuits. The adapter includes a first switching circuit which responds to the level of an input signal, and which actuates an oscillator which includes the primary of a transformer as its load. Energy is transferred by the transformer secondary to appropriate control circuits for use elsewhere. The adapter also includes a second switching circuit which also responds to a different level of the input signal, the second switching circuit diverting the input signal current into itself across an artificial load when the first switching circuit is inoperative. By adjusting component values in the basic circuit, the adapter can accept and provide a wide range of AC or DC voltages and currents.

REFERENCES:
patent: 4163278 (1979-07-01), Onoue et al.
patent: 4315208 (1982-02-01), McElroy et al.
patent: 4494064 (1985-01-01), Harkness

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