Schmitt trigger circuit

Details Schmitt trigger circuit Schmitt trigger circuit

1976-09-22

1977-12-13

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307290, H03K 3286, H03K 3295, H03K 3353

Patent

active

040631192

ABSTRACT:
This invention relates to a Schmitt trigger circuit, and particularly to a Schmitt trigger circuit comprising MOS transistors.
The all MOS transistor Schmitt trigger circuit has a first MOS input inverting amplifier regeneratively coupled with a further MOS transistor to provide the requisite positive feedback voltage, and a second MOS input inverting amplifier, not in the feedback loop but having the feedback voltage also applied thereto, the output being taken from the second inverter.
Separation of output from the feedback loop gives flexible control of input triggering points and output characteristics.
This circuit is intended for use in a MOS IC telephone switching cross-point switch.

REFERENCES:
patent: 3612908 (1971-10-01), Heimbigner
patent: 3851189 (1974-11-01), Moyer
patent: 3873856 (1975-03-01), Gerlach et al.
patent: 3882331 (1975-05-01), Sasaki
patent: 3904888 (1975-09-01), Griffin
patent: 3984703 (1976-10-01), Jorgensen

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