Voltage detector
US7030668B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 2003 |
| Grant date | Apr 18, 2006 |
| Priority date | — |
| Expiry date | Jun 24, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/223
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage detector circuit such as a power up and/or brownout detector circuit (100) includes a comparator (102) having at least one of its inputs (104) coupled to a diode-connected transistor (108). The other input can include another diode-connected transistor (110) or a resistor divider (302). Optional compensation capacitors (118 and 120) can be added to the comparator output (116) to provide glitch compensation. Since comparator (102) only needs to output a high or low voltage level, the components that are used to build circuit (100) do not have to have very tight tolerances. Circuit (100) also can operate at very low voltages and consume low amounts of power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.