Input circuit and semiconductor integrated circuit device includ

Details Input circuit and semiconductor integrated circuit device includ Input circuit and semiconductor integrated circuit device includ

1996-04-25

1998-07-14

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

Switch actuation

307139, 327198, 327317, 327318, H01H 700

Patent

active

057809429

ABSTRACT:
The disclosed input circuit incorporated in semiconductor integrated circuit device will not be operated erroneously due to fluctuations of a supply (or reference) potential caused by noise, for instance. The input circuit includes a signal input terminal for applying an external input signal; a first input potential detecting circuit for comparing a potential of the input signal with a predetermined supply (or reference) potential to detect a potential difference between the two; a second input potential detecting circuit activated in response to a control signal, for comparing the potential of the input signal with the predetermined supply (or reference) potential to detect the potential difference between the two; a delay circuit for delaying an output of the first input potential detecting circuit by a predetermined delay time; a latch circuit for inputting an output signal of the delay circuit as data and an output signal of the second input potential detecting circuit as a clock, to generate an output signal according to potentials of these two inputted signals; and a signal output terminal for outputting the output signal of the latch circuit.

REFERENCES:
patent: 4849657 (1989-07-01), Boisvert
patent: 5345422 (1994-09-01), Redwine
patent: 5369310 (1994-11-01), Baydal et al.

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