Class AB voltage current convertor having multiple transconductance stages and its application to power amplifiers
US6496067B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2002 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Jan 7, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45757
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A Class AB voltage-to-current converter includes a primary transconductance stage, secondary transconductance stage, and a biasing circuit. The biasing circuit generates a primary bias voltage that is greater than a generated secondary bias voltage. As such, the primary transconductance stage 12 becomes active before the secondary transconductance stage 14 with respect to the magnitude of a differential input voltage 18, thereby allowing the transconductance of the secondary transconductance stage to be added (or subtracted) from the transconductance of the primary stage to improve the overall transconductance of the Class AB voltage-to-current convert.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.