High speed operational amplifier design
US7013118B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2002 |
| Grant date | Mar 14, 2006 |
| Priority date | — |
| Expiry date | Dec 19, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/406
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radio receiver portion of a transceiver includes a differential amplifier that is used to provide a fast response. A pair of input MOSFETs of the differential amplifier stage are coupled to an active load. A voltage follower circuit is coupled to each output stage of the two stage differential amplifier to drive a current through a load without reducing the output voltage. The voltage follower stages each include a current mirror that replicates current level defined by an input MOSFET of the voltage follower circuit and, by its configuration, a voltage level produced by the differential amplifier to the input MOSFET of the voltage follower circuit. Accordingly, the differential amplifier stage defines the amplification of the circuit while the voltage follower circuits replicate the amplified output with the ability to drive a load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.