Low current power detection circuit providing window comparator functionality
US8022734B1 · kind B1 · utility
3Cited by
19References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 25, 2008 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | Oct 23, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0272
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A power detection system is disclosed that includes a detector circuit and a comparator circuit. The detector circuit includes a first transistor, a second transistor that is not identical to the first transistor, and a third transistor that is substantially identical to the first transistor. Each of the transistors is commonly coupled to a current source and is coupled to a differential input voltage. The comparator circuit is for providing an output that is representative of whether the input voltage is above or below a threshold voltage responsive to a difference between the first transistor and the second transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.