Electronic bipolar interface circuit

Details Electronic bipolar interface circuit Electronic bipolar interface circuit

1985-10-21

1988-08-09

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307239, 307475, 307127, 363 63, 340644, G05B 1112, H03K 1700

Patent

active

047630175

ABSTRACT:
An electronic bipolar interface driver circuit for interconnecting a microprocessor to an electromagnetic relay load. The driver circuit includes a peripheral adapter circuit having a pair of outputs connected to a respective one of the two inputs of a pair of NAND gates. A source of square-wave signals connected to the other inputs of the two input NAND gates so that a.c. signals are supplied to one of two switching amplifiers. The a.c. signals are transformer-coupled to a pair of rectifiers. The rectified d.c. voltage is supplied to either one of two switching transistors which establishes a given polarity of voltage on a pair of output terminals and which illuminates one of two optical couplers to feedback a checking signal to the peripheral adapter circuit to verify the polarity of the voltage on the output terminals.

REFERENCES:
patent: 3371223 (1968-02-01), Gilbert
patent: 3571688 (1971-03-01), Tomasulo, Jr. et al.
patent: 3819951 (1974-06-01), Moore

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