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OpAmp-Slide13

The error caused by bias current can be reduced by choosing an amplifier with very low input bias current. CMOS and JFET input stages have the lowest bias current. However, the bias current of JFET input op amps is more susceptible to temperature variation. In some JFET op amps the bias current will double for every 10°C rise in temperature. So bias current over the full temperature range should be taken into consideration.

PTM Published on: 2009-01-26