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Method to Use a Programmed Array Logic As a Differential Receiver

IP.com Disclosure Number: IPCOM000039852D
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Buckland, PA [+details]

Abstract

Many currently available differential receivers do not work well at certain interface frequencies. When an interface uses differential drivers and receivers on its serial data and clock signals and these differential signals run at 5 to 15 MHz, currently available receivers can distort the signals so much that the data is unreadable. The solution is to use a specially Programmed Array Logic (PAL) to act as a differential receiver. The PAL has very low signal distortion and can easily work at 15 MHz. The PAL is not a true differential receiver in that its input signals must be at TTL (transistor-transistor logic) levels. This is not a problem with an interface that specifies drivers which drive the signals to TTL levels.