Semiconductor device to prevent a circuit from being inadvertently active
US7026855B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2004 |
| Grant date | Apr 11, 2006 |
| Priority date | — |
| Expiry date | May 26, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/356182
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A semiconductor device includes a first circuit block which operates on a first power supply voltage to output a first digital signal having an amplitude equal to that of the first power supply voltage, a level shifting circuit into which the first digital signal is input and which converts the amplitude of the first digital signal to an amplitude equal to that of a second power supply voltage to output as a second digital signal via an output terminal, a second circuit block which operates on the second power supply voltage and into which the second digital signal is input, and a monitor circuit which produces a first signal to set the output terminal of the level shifting circuit to a predetermined potential in a case where the first power supply voltage drops below a predetermined voltage level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.