Amplifier, fully-differential amplifier and delta-sigma modulator
US9007249B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2013 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Dec 19, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/39
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier includes a front-end gain stage and an AC-coupled push-pull output stage. The AC-coupled push-pull output stage includes a first transistor, having a source, a drain and a gate, wherein the source of the first transistor is coupled to a first voltage level; a second transistor, having a source, a drain and a gate, wherein the source of the second transistor is coupled to a second voltage level, the gate of the second transistor is coupled to the front-end gain stage, and the drain of the second transistor is coupled to the drain of the first transistor to form an output terminal of the amplifier; an AC-coupled capacitor, which is a passive two terminal electrical component coupled between the front-end gain stage and the gate of the first transistor; and a resistance component, coupling the gate of the first transistor to a bias voltage level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.