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Testing Multiplexing Circuits

IP.com Disclosure Number: IPCOM000069889D
Original Publication Date: 1978-Jul-01
Included in the Prior Art Database: 2005-Feb-21

Publishing Venue

IBM

Related People

Authors:
Robinson, FL Schaaf, RL [+details]

Abstract

In some signal transfer systems, a control computer receives signals from a demultiplexer (DEMPX) which is operated independent of the clock rate of the control computer. For example, an independent counter system can actuate a DEMPX to scan an input from a 2 x 1 funnel which received data signals from a data source-sink which, in turn, is timed by the independent counter system. To ensure that all of the demultiplexing operations are being faithfully performed, an "A" signal is supplied by the control computer to the 2 x 1 funnel as the funnel is actuated for a multiplexer (MPX) test.