A new CMOS low-voltage transconductor suitable for VHF continuous-time filters is proposed. The transconductance is tunable with the tunable input common-mode voltage. The output resistance of the transconductor is compensated and the resulting output resistance can be fine-tuned by means of a separate voltage. The transconductor has a large bandwidth due to excess phase compensation. Further, it exhibits low distortion due to the square-law linearization technique used. The performance of the transconductor is shown by simulation results.
Low-voltage current-mode analogue continuous-time filters