Power up signal generation circuit and method for generating power up signal
US7852129B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 7, 2008 |
| Grant date | Dec 14, 2010 |
| Priority date | — |
| Expiry date | Nov 7, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/223
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power up signal generation circuit transits a power up signal at a predetermined target voltage level by providing a predetermined hysteresis characteristic to the target voltage level of a power supply voltage corresponding to the power up signal. The power up signal generation circuit includes a first voltage detection unit that detects a first target voltage level of a power supply voltage to output a detection signal. The circuit also includes a second voltage detection unit that detects a second target voltage level of the power supply voltage in response to a power up signal to output a control signal, wherein the second target voltage level is lower than the first target voltage level. A power up signal drive unit of the circuit activates the power up signal in response to the detection signal and drives the power up signal in response to the control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.