Schmitt trigger circuit with CMOS inverters and filtering means

Details Schmitt trigger circuit with CMOS inverters and filtering means Schmitt trigger circuit with CMOS inverters and filtering means

1993-04-02

1995-08-01

Stephan, Steven L.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

327345, H03K 33565

Patent

active

054382920

ABSTRACT:
A Schmitt trigger circuit which eliminates malfunctions due to high frequency noise and is operable for signals in the direct current region, includes a resistor provided between an input terminal and an input node of MOS inverters, and a capacitor provided in feedback loop. The resistor and the capacitor act as a low pass filter. The capacitor maintains the Schmitt operation by its charging operation, despite the inclusion of noise in the input signal.

REFERENCES:
patent: 2912653 (1957-01-01), Tillman
patent: 3521242 (1970-05-01), Katz
patent: 4039862 (1977-08-01), Dingwall et al.
patent: 4115748 (1978-09-01), Kubo et al.
patent: 5086331 (1992-02-01), Hartgring et al.
Millman & Taub, "Pulse, Digital, and Switching Waveforms", 1965, pp. 375-378 & pp. 396-399.
The Penguine Dictionary of Electronics, E. C. Young, 1988, (pp. 505, 39, 371-372, 199-200, 518, 396).

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