Power supply circuit for south bridge chip
US7795957B1 · kind B1 · utility
Assignees
Inventor
Key dates
| Filing date | Sep 11, 2009 |
| Grant date | Sep 14, 2010 |
| Priority date | — |
| Expiry date | Sep 11, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/22
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power supply circuit for a south bridge chip includes a voltage conversion chip having a first voltage input terminal, a second voltage input terminal, a driving voltage output terminal, and a gate voltage output terminal, a control circuit having a first control terminal, a second control terminal, and an output terminal, and a filter circuit coupled between the control circuit and the south bridge chip. The voltage conversion chip receives a first voltage and a second voltage from a power supply at the first and second voltage input terminals respectively, and outputs driving voltages at the driving voltage output terminal and gate voltage output terminal respectively. The control circuit receives the driving voltages at the first and second control terminals respectively, and outputs a working voltage to the south bridge chip via the filter circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.