Patent · US Active

Analog rail-to-rail comparator with hysteresis

US8558581B2 · kind B2 · utility

2Cited by

5References

20Claims

0Family size

Assignee

Atmel Corporation · US

Inventors

Armin Prohaska · Blaustein, DE
Holger Vogelmann · Waldenbuch, DE

Key dates

Filing date	Nov 11, 2011
Grant date	Oct 15, 2013
Priority date	—
Expiry date	Dec 22, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH03K3/02337
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

According to a novel aspect, operating an analog rail-to-rail comparator circuit with common mode detection of differential input signals includes generating a hysteresis current for the comparator circuit based on a common mode voltage used for the common mode detection. The hysteresis current is added to a differential output of a comparator in the comparator circuit, such that a hysteresis voltage at an output of the comparator circuit is substantially independent of the common mode voltage.

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