Method of using a bandgap voltage comparator in a low voltage detection circuit
US6384670B1 · kind B1 · utility
11Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2001 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Jul 30, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/265
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A bandgap voltage comparator requiring the summing of only two current sources is used to detect low voltage conditions for an logic on an integrated circuit that may be powered from a battery, fuel cell, solar cell and the like. Independent high and low voltage trip points may be programmed in the bandgap low voltage detection system. A power-on-reset delay may be used before asserting a voltage level ok status signal. Power may be disconnected from the bandgap voltage comparator low voltage detection system to conserve power, and power can be reapplied to quickly determine whether a desired voltage level is present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.