Voltage detection device
US7928776B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 21, 2008 |
| Grant date | Apr 19, 2011 |
| Priority date | — |
| Expiry date | Nov 20, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/26
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An voltage detection device includes a comparator circuit comprising a first input terminal connected to a system power supply, a second input terminal connected to a standby power supply, an output terminal capable of outputting a control voltage according to comparison result; an indicator circuit; and a switch circuit connected between the standby power supply and the indicator circuit, comprising a control terminal to receive the control voltage from the comparator circuit thereby to control the standby power supply supplied to the indicator circuit or not; a power state terminal of the computer connected to a node between the standby power supply and the indicator circuit, wherein the power state terminal is at a low level when the computer is turned off. The voltage detection device can ensure that all the power supplies provide power to the computer components normally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.