Universal electronically Tunable Current-mode Biquadratic Filters
Weidong Wang · Telecommunication Engineering · 2003
A complete state variable current-mode biquadratic filters built by duo-output CCⅡ (DOCCⅡ) with variable current gain is presented . All the coefficients of the filter can be independently tuned through the variable current gain factors of the DOCCⅡ.Based on the principles upon which the general biquadratic filter was constructed, a universal electronically tunable current-mode filter is proposed which implements the low-pass, high-pass, band-pass, band-reject and all-pass second order transfer functions simultaneously. The PSPICE simulation frequency responses of second-order filter are also given.