NOVEL OTA-C VOLTAGE MODE-CURRENT MODE BIQUAD FILTER

This paper introduces three new OTA-C universal biquad filters which offers almost all of the desirable features (as expected in a good biquad) simultaneously with any major tradeoffs. The two biquads (a VM-based biquad and a CM-based biquad) are combined efficiently to form a hybrid biquad that can be digitally controlled to convert into either of the two with similar responses. The workability of the new circuits has been well established by SPICE simulation results of their CMOS-implementable versions.