eng Science and Education Publishing American Journal of Electrical and Electronic Engineering 2014-11-23 2 6 159 164 10.12691/ajeee-2-6-1 AJEEE2014261 article Bilal Arif arifbilal25@gmail.com 1 Mohd. Usama Ismail 1 Ale Imran 1 Department of Electronics Engineering, Aligarh Muslim University, Aligarh, India In this paper, a digitally controlled single input multi output current-mode K.H.N. Biquad Filter is presented. The filter circuit is composed of three DVCCs together with four grounded resistors and two grounded capacitors. The digital control is incorporated using a current-summing network (CSN). Tuning of resonant frequency is carried out by 3-bit digital control word. Block by block replacement has been done to observe the change in the relationship between resonant frequency of the band-pass filter with the control word. The filter circuit showed three different variations when the DVCC blocks were replaced (one by one) with 3-bit DC-DVCC blocks. PSPICE simulations using TSMC 0.25 micron CMOS technology have been performed to validate the theoretical results. http://pubs.sciepub.com/ajeee/2/6/1/ajeee-2-6-1.pdf Current-mode Differential Voltage Current Conveyor (DVCC) multifunctional filter digitally controlled DVCC (DC-DVCC) Cut off frequency KHN Biquad filter