A frequency tuning technique based on envelope locked loop is proposed for Gm-C filters. A degenerated integrator is used as the master circuit to eliminate the problems associated with the DC offset of the operational transconductance amplifier (OTA).
No takes yet. Share an insight, caveat, or question.
Changsik Yoo (2002) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: