Internal voltage conversion circuit
US5773968A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1996 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Sep 11, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/465
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A voltage conversion circuit that includes a reference voltage generation circuit, an output circuit, and an output control circuit. The reference voltage generation circuit outputs a first reference voltage and a second reference voltage which is higher than the first reference voltage by a predetermined voltage. Based on the first reference voltage, the output circuit outputs an internally converted voltage. The output control circuit reduces the internally converted voltage when the control circuit outputs a higher internally converted voltage than the second reference voltage. In accordance with the voltage conversion circuit, even when there occurs an increase in the internally converted voltage due to the flow of very small leakage currents between an external power supply and the internal voltage conversion circuit, the internally converted voltage is lowered by the output control circuit when it exceeds the second reference voltage output from the reference voltage generation circuit. This prevents an excess increase in the internally converted voltage, which ensures that internal elements in the semiconductor integrated circuit can be fed a stable voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.