Bootstrap circuit and bulk circuit thereof
US8026705B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2009 |
| Grant date | Sep 27, 2011 |
| Priority date | — |
| Expiry date | May 27, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/158
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A bootstrap circuit is utilized in a bulk circuit using an NMOS transistor as a power switch. The bootstrap circuit includes a first PMOS transistor coupled between an internal power source and an offset capacitor, and a second PMOS transistor coupled between the gate of the first PMOS transistor and the offset capacitor, and an NMOS transistor coupled between the gate of the first PMOS transistor and ground. When the power switch is turned on, the second PMOS transistor is turned on for turning off the first PMOS transistor. When the power switch is turned off, the NMOS transistor is turned on for turning on the first PMOS transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.