Semiconductor device for generating power on reset signal
US7646222B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2006 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Jan 12, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/24
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A reference voltage generating circuit receives a power supply voltage and generates a reference voltage. A reference voltage level guarantee circuit generates a sense signal when the circuit senses that a value of the reference voltage has reached a predetermined value. A power supply voltage sensing circuit has a voltage comparator circuit which compares a voltage obtained by dividing a power supply voltage with the reference voltage and outputs a power ON reset signal. An operation of the voltage comparator circuit is controlled based on a sense signal. When the value of the power supply voltage increases and the value of the reference voltage reaches a predetermined value, the voltage comparator circuit operates, and a power ON reset signal is outputted in response to a result of comparison between a divisional voltage and the reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.