Power-up signal generating apparatus
US7212046B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 2004 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Aug 5, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/205
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a power-up signal generating device, a power-up signal is activated at a certain level of the power supply voltage VDD by adjusting the turn-on resistance value of the MOS transistor so that the chip reliability can be improved. The power-up signal generating device comprises a reference voltage generating unit, a bias level adjusting unit, a bias signal generating unit and a signal outputting unit. The reference voltage generating unit generates a reference voltage. The bias level adjusting unit receives the reference voltage as an input for controlling a voltage level of a bias signal in a constant level. The bias signal generating unit generates the bias signal under control of the bias level adjusting unit. The signal outputting unit outputs a power-up signal depending on the voltage level of the bias signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.