Comparators
US6420909B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1999 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Apr 29, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/2481
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit compares a first voltage and a second voltage using a comparator. The comparator has a current divider for dividing a bias current in accordance with the values of the first and second voltages, and for providing two currents. The comparator also has a current differentiation circuit for receiving the two currents and providing an output signal dependent upon the difference between the currents. At least one of the current divider and current differentiation circuits are arranged to weight one of the two currents with respect to the other current so that the output signal is only provided when the difference between the first and second voltages exceeds an offset value. A bias generator is provided which includes a second comparator having similar components in the same configuration as the comparator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.