Amplifier system and method for controlling amplifier
US10263585B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 2017 |
| Grant date | Apr 16, 2019 |
| Priority date | — |
| Expiry date | Nov 1, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/75
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier system includes a main amplifier, a cross-over current detector and a controller. The main amplifier includes at least a first driving transistor and a second driving transistor serving as a differential pair, wherein the first driving transistor and the second driving transistor are arranged to receive a first input signal and a second input signal, respectively. The cross-over current detector is coupled to the main amplifier, and is arranged for detecting a cross-over current of the main amplifier, wherein the cross-over current of the main amplifier is an overlapped current from the differential pair. The controller is coupled to the main amplifier and the cross-over current detector, and is arranged for generating a control signal to control a gain of the main amplifier according to an output of the main amplifier and the cross-over current of the main amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.