Operational transconductance amplifier with independent transconductance and common mode feedback control
US5491447A · kind A · utility
28Cited by
20References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 1994 |
| Grant date | Feb 13, 1996 |
| Priority date | — |
| Expiry date | May 13, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45574
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An integrated biquadratic, continuous-time filter section includes a plurality of operational transconductance amplifiers (OTAs). Simutaneously changing a transconductance (GM) of each of the OTAs is provided by adjusting a differential voltage applied to a plurality of differential transistor pairs of each OTA. Each of the OTAs include a plurality of current sources and a common mode feedback circuit for controlling a common mode output voltage level. Changing the transconductance of the OTA is independent of the common mode voltage level control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.