Logic select circuit

Details Logic select circuit Logic select circuit

1981-02-18

1983-07-05

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307559, 307360, 307317R, H03L 500, H03K 522

Patent

active

043920675

ABSTRACT:
A circuit for use with interface systems for providing a threshold setting function wherein the system can be made to interface with T.sup.2 L or CMOS logic with either 5 or 15 volt power supply capabilities. The circuit comprises a pair of matched resistors coupled in series to one another. The first one of the resistors is returned to a select terminal via a first pair of diodes. The second resistor is returned to a terminal at which may be supplied a ground reference potential via a second pair of diodes. A source of current is provided that is coupled to the interconnection of the second resistor with the second pair of diodes. A threshold output is provided to the interface system at the interconnection between the serially connected resistors.

REFERENCES:
patent: 3974404 (1976-08-01), Davis
patent: 4147940 (1979-04-01), Beydler et al.
patent: 4220876 (1980-09-01), Ray
patent: 4309693 (1982-01-01), Craven

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