Operational transconductance amplifier with independent transconductance and common mode feedback control
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United States of America Patent
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Feb 13, 1996
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N/A
app pub date -
May 13, 1994
filing date -
May 13, 1994
priority date (Note) -
Expired
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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.
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