Continuous time low-pass filter for video frequency applications

Abstract

In this paper a continuous-time 4/sup th/ order Butterworth lowpass filter based on current-mode processing is presented for applications over the video frequency range. Using a very low-cost 2.4 /spl mu/m CMOS process (Mietec), the circuit occupies 2.8 mm/sup 2/ and consumes 19 mW from a /spl plusmn/1.5 V supply. Experimental results are given for a 4.5 MHz to 12 MHz tunable lowpass filter with 58 dB of dynamic range at 10 MHz.