CMOS video filters using switched capacitor 14 MHz circuits

Abstract

In order to realize self-contained analog video LSI, video band switched-capacitor (C) filters, including a two-dimensional filter, have been experimentally fabricated. By using 2-/spl mu/m/spl middot/CMOS technology and high-speed/high-precision circuits, an LSI clock rate of 14 MHz, signal swing of 2 V p-p with a single 5-V supply, random noise S/N of 60-70 dB p-p/r.m.s at LSI output, and power dissipation of less than 5 mW per amplifier have been achieved. Single-stage cascode amplifiers are extensively used to attain video band speed. Neutralization is introduced into fully differential filters to improve their frequency response.