Low frequency digitally programmable universal filter for communication system

This paper presents a low frequency digitally programmable voltage mode universal filter for modern communication systems. It employs four digitally programmable second generation current conveyors (DPCCII), two grounded capacitor and five resistors. The proposed circuit offers the features such as realization of all the standard filter functions from same configuration, independent digital control of filter parameters, no component matching constraint and low sensitivity figure. SPICE simulation results are demonstrated to confirm the theoretical analysis.