Low voltage supply comparator and a method to operate the comparator
US8575977B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2012 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Mar 23, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/2481
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A comparator is disclosed. The comparator includes a mirror circuit that is electrically coupled to a first voltage source and a second voltage source. The first voltage source produces a first voltage and the second voltage source produces a second voltage. The comparator also includes a first positive metal oxide semiconductor (PMOS) transistor electrically coupled to the first voltage source and an output terminal. The first PMOS transistor is biased by the mirror circuit. The comparator also includes a first negative metal oxide semiconductor (NMOS) that is electrically coupled to a ground terminal and the output terminal. The first NMOS transistor is also biased by the mirror circuit. An electrical current flowing across the first NMOS transistor is mirrored from an electrical current flowing through the first PMOS transistor. A method to operate the comparator and a comparator system is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.