NEW PROGRAMMABLE OMEGA(N) AND Q KHN FILTER

A new technique for the implementation of programmable undamped natura l frequency (omega(n)) and quality factor (Q) MOSFET-C filters is intr oduced. The technique employs nonlinear circuits in the feedback path of the filter allowing the tuning of Q through DC control voltages. Th e resulting topology is fully compatible with MOS technology. The natu ral frequency of the filter is also tunable via DC voltage-controlled transconductance elements. The application of this technique to the Ke rwin-Huelsman-Newcomb filter is presented together with simulation res ults.