Trinary to binary level conversion circuit

Details Trinary to binary level conversion circuit Trinary to binary level conversion circuit

1991-04-10

1991-09-03

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307443, 307451, 307473, 307261, 341 57, H03K 1730, H03K 17693

Patent

active

050457284

ABSTRACT:
An electronic circuit for converting trinary level input signals on a first line into binary level signals on two or more output lines using contemporary CMOS field effect transistor integrated circuits. According to one embodiment, conversion is accomplished using two CMOS inverters each asymmetrically configured to exhibit transconductances which differ by a factor in excess of 5. In another form, the circuit provides hysteresis through positive feedback to limit binary output state perturbations attributable to trinary signal level input noise. The invention also encompasses the use of decode logic and logically combined delay elements to eliminate "glitches" and facilitate selective enablement of the decoded states representing the intermediate of the trinary input levels.

REFERENCES:
patent: 4302690 (1981-11-01), Gollinger et al.
patent: 4682047 (1987-07-01), von Sichart
patent: 4682052 (1987-07-01), Kyomasu
patent: 4808854 (1989-02-01), Reinagel

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