skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Electronic logic for enhanced switch reliability

Abstract

A logic circuit is used to enhance redundant switch reliability. Two or more switches are monitored for logical high or low output. The output for the logic circuit produces a redundant and fail-safe representation of the switch outputs. When both switch outputs are high, the output is high. Similarly, when both switch outputs are low, the logic circuit's output is low. When the output states of the two switches do not agree, the circuit resolves the conflict by memorizing the last output state which both switches were simultaneously in and produces the logical complement of this output state. Thus, the logic circuit of the present invention allows the redundant switches to be treated as if they were in parallel when the switches are open and as if they were in series when the switches are closed. A failsafe system having maximum reliability is thereby produced.

Inventors:
Issue Date:
OSTI Identifier:
6013447
Application Number:
ON: TI85006008
Assignee:
Dept. of Energy SNL; EDB-85-039218
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; LOGIC CIRCUITS; DESIGN; SWITCHES; ELECTRICAL EQUIPMENT; ELECTRONIC CIRCUITS; EQUIPMENT; 420800* - Engineering- Electronic Circuits & Devices- (-1989)

Citation Formats

Cooper, J.A. Electronic logic for enhanced switch reliability. United States: N. p., 1984. Web.
Cooper, J.A. Electronic logic for enhanced switch reliability. United States.
Cooper, J.A. Fri . "Electronic logic for enhanced switch reliability". United States.
@article{osti_6013447,
title = {Electronic logic for enhanced switch reliability},
author = {Cooper, J.A.},
abstractNote = {A logic circuit is used to enhance redundant switch reliability. Two or more switches are monitored for logical high or low output. The output for the logic circuit produces a redundant and fail-safe representation of the switch outputs. When both switch outputs are high, the output is high. Similarly, when both switch outputs are low, the logic circuit's output is low. When the output states of the two switches do not agree, the circuit resolves the conflict by memorizing the last output state which both switches were simultaneously in and produces the logical complement of this output state. Thus, the logic circuit of the present invention allows the redundant switches to be treated as if they were in parallel when the switches are open and as if they were in series when the switches are closed. A failsafe system having maximum reliability is thereby produced.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}