Digitally programmable voltage mode universal filter

A novel single input multiple output (SIMO) voltage-mode (VM) digitally programmable universal filter (DPUF) is proposed in this paper. The proposed biquad is realized using digitally programmable current feedback amplifier (DPCFA) as main analog building block (ABB). The biquad can concurrently simulate all filters functions without requiring any alteration in its configurations all the filter parameters namely pole frequency and quality factor can be programmed independently. Other important feature of proposed biquad includes use of grounded capacitor, full cascadability, no component matching condition and low active/passive sensitivity figures. Working of the proposed DPUF is confirmed by presenting SPICE simulations.