Zero-overhead class G amplifier with threshold detection
US6614310B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2001 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Oct 31, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/025
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention provides an apparatus and method for operating driver amplifier (20) of a line driver circuit (10) from a lower set of power supply voltages, and from a higher set of voltages only when the amplitude of the signal (12) being transmitted by the line driver (20) requires it as determined by a comparator (18). Advantageously, this reduces the power dissipation in the line driver (10) by operating the line amplifier (20) the majority of the time from the lower supply voltage. A delay circuit (14) delays the signal to be amplified sufficient to allow the transitioning of the power supply voltages provided to the amplifier hysteresis of this power supply voltage switching may also be used to further reduce power dissipation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.