Comparator circuit for positive and negative signals having zero consumption and suitable for devices with single positive power supply
US6362663B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2000 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | May 3, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/08
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A comparator circuit for positive and negative signals having zero consumption and suitable for devices with a single positive power supply includes a first and second comparator connected in parallel and receiving a common input signal and, respectively, a first positive threshold voltage and a second negative threshold voltage. The comparator circuit further includes a first logic circuit cascade-connected to the first and second comparators. The first and second comparators are respectively suitable to detect the crossing on the part of the input signal of the first and second threshold voltages. The second comparator is provided by n-channel and p-channel MOS transistors of the enhancement type. The comparator circuit also includes a second logic circuit cascade-connected to the first logic circuit, and a monostable circuit connected to the second logic circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.