Method and system for improving amplifier efficiency
US6833757B2 · kind B2 · utility
2Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2000 |
| Grant date | Dec 21, 2004 |
| Priority date | — |
| Expiry date | Apr 22, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/432
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
One aspect of the invention is an amplifier (10), comprising an input stage amplifier (20) coupled to an output node (81). The amplifier (10) further comprises a class D output stage (50), which comprises at least two switching elements (P1, N1) and coupled to the output node (81). The amplifier (10) also comprises a control circuit (40) coupled to the output stage (50). The control circuit (40) is operable to produce a tri-state output of the output stage (50) in response to a sensed value proportional to an amount of current that flows to the output node (81).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.