TV ghost cancellation system using switched capacitor circuits

Abstract

In TV reception, picture quality is one of the primary criteria in design. Ghost signals are one of the major causes of distortion and cannot be avoided in the TV receiver. Ghost cancellation is a nullifying operation and allows one to reduce the effect on the picture quality as much as possible. A ghost cancelling network using switched capacitor circuits for CCIR system B for television transmissions is presented in this paper. A two-stage switched capacitor (SC) transversal filter has been used for reduction of distortion. In this paper, the system has been simulated at the block diagram level and the component level using METLAB and PSpice respectively. Results show that simulated system is able to suppress ghosts with delays ranging from 0.1 /spl mu/s to 20 /spl mu/s, with a ghost suppression threshold at 1% amplitude.