Bias supply selection circuit, method of operation thereof and power supply employing the same
US6693812B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2002 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Aug 12, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33507
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a bias supply selection circuit employable with a linear regulating device configured to provide a first bias supply voltage and a main bias supply stage configured to provide a second bias supply voltage. In one embodiment, the bias supply selection circuit includes a voltage monitoring circuit configured to monitor a level of the second bias supply voltage and to provide a control voltage proportional to the level. Additionally, the bias supply selection circuit includes a controllable switching circuit, coupled to the voltage monitoring circuit, configured to select the second bias supply voltage by deactivating the linear regulating device when the control voltage reaches a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.