Comparator circuit with Schmitt trigger hysteresis character
US7292083B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2006 |
| Grant date | Nov 6, 2007 |
| Priority date | — |
| Expiry date | May 27, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/2472
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit and a method are provided to produce a novel comparator with Schmitt trigger hysteresis character. The circuit includes a current source which controls the magnitude of current flow through this comparator circuit. It has a first logic device which is turned ON by a reference voltage, and a second logic device is turned ON by a comparator input voltage. A first feedback device is turned ON by a negative comparator output. A first parallel resistor is connected in parallel to the first feedback device. A second feedback device is turned ON by a positive comparator output. A second parallel resistor is connected in parallel to the second feedback device. The first and second parallel resistors are used to provide the differential comparator with switching voltage offsets which result in the Schmitt trigger hysteresis character.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.