Output stage utilizing a floating power supply
US6259317A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1999 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Sep 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/5387
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching output stage for Class D amplifiers and the like utilizes a floating power supply providing a relative positive output voltage VP at a first line and a relative negative output voltage VM at a second line. Two switches are connected in parallel across the two lines. The first switch has a common to ground and switches between VP and VM, and the second switch has a common to a low pass output filter and switches between VP and VM. The input to the filter can take on three values, VP, VM, and 0. The input VP to the filter is achieved by switching the first switch to VM and the second switch to VP, and the input VM to the filter is achieved by switching the first switch to VP and the second switch to VM. The input 0 to the filter may be achieved by switching both the first switch and the second switch either to VP or to VM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.