Patent · US Expired

Schmitt trigger circuit

US4063119A · kind A · utility

16Cited by

6References

2Claims

0Family size

Assignee

International Standard Electric Corporation · US

Inventors

Alexander D. Odell
John M. Young · Palm Harbor, US
Kenneth A. M. Arton · Sawbridgeworth, GB

Key dates

Filing date	Sep 22, 1976
Grant date	Dec 13, 1977
Priority date	—
Expiry date	Sep 22, 1996

Classification

Technology area (CPC H)Electricity
CPC primaryH03K3/3565
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.