Power-on-reset generator using a voltage-shaping inverter chain
US8035426B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2008 |
| Grant date | Oct 11, 2011 |
| Priority date | — |
| Expiry date | Sep 8, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/223
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
This application discloses a device that has a power-on reset generator. The power-on reset generator can include a power-on detector that receives an input electrical signal and outputs a digital signal that has predetermined value when the voltage of the input electrical signal exceeds a threshold voltage. The power-on detector can include multiple voltage-shaping elements arranged in series. Each voltage-shaping element can have a P-channel transistor and an N-channel transistor that differs in strength with respect to the P-channel transistor. The power-on detector can also include a switch that locks the digital signal at the predetermined value when the voltage of the input electrical signal exceeds the voltage threshold. In addition to the power-on detector, the power-on reset generator can include a digital delay that receives both the digital signal and a clock signal. The power-on reset generator can wait a predetermined time delay after the digital signal reaches the predetermined value then de-assert the reset signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.