64 Stage BCD (Bulk Charge-Transfer Device) Analog Memory with Differential Integrated Clock Pulse Generator

Abstract

A 64 stage BCD (Bulk Charge-transfer Device) with a new differential integrated clock pulse generator is developed. The device effectively eliminates problems of interference from external clock pulse circuits to a picture tube, and of output voltage variation in varying clock pulse frequency of a conventional device. The BCD consists of two clock pulse circuits fabricated differentially to drive two arrays separately. Experimental results show good matching of the two arrays. In addition, the device requires only one TTL level master pulse and two power supplies, thus enhancing its application to practical video delay lines.