Application to electronically tunable biquad filter l'he application example of the newly defined VIDGA is demonstrated on the design of three-input single-output electronically tunable voltage-mode iquadratic filter. As shown in Fig. 9, the designed lilter is constructed using only two VDGAs and two floating capacitors. Note that the floating capacitor can easily be implemented using advanced integrated circuit(IC) technologies. These new IC technologies offer a second poly layer(poly2), which also enables the realization of