Power supply circuit
US7990124B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Nov 4, 2008 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Mar 27, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply circuit for a motherboard includes a VRM, a first NMOS transistor, a second NMOS transistor, a first capacitor, a first induction coil, and a delay circuit. A gate of the first NMOS transistor is connected to a UGATE pin of the VRM. A source of the first NMOS transistor is connected to a BOOT pin of the VRM via the first capacitor and a PHASE pin of the VRM, and connected to an MCH on the motherboard via the first induction coil. A drain of the first NMOS transistor is connected to a system power. A gate of the second NMOS transistor is connected to an LGATE pin of the VRM. A source of the second NMOS transistor is grounded. A drain of the second NMOS transistor is connected to the source of the first NMOS transistor and the delay circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.