The authors present a low voltage, large swing, transconductor in a 0.
5 mu m CMOS digital technology which preserves a constant input window
independent of tuning. The transconductance can be digitally adjusted
in coarse steps and continuously adjusted in fine steps. The total ha
rmonic distortion is better than -50dB for signal amplitudes of 1.8V(p
-p) and power consumption is 1.5mW from a 3.3V power supply.