Communications: electrical – Digital comparator systems
Patent
1974-08-05
1976-10-26
Morrison, Malcolm A.
Communications: electrical
Digital comparator systems
179 15BA, 328111, G06F 1516
Patent
active
039887162
ABSTRACT:
An interface logic circuit permitting the transfer of information between two computers having asynchronous clocks is disclosed. The information transfer involves utilization of control signals (including request, return-response, ready) to generate properly timed data strobe signals. Noise problems are avoided because each control signal, upon receipt, is verified by at least two clock pulses at the receiving computer. If control signals are verified, a data strobe pulse is generated to accomplish a data transfer. Once initiated the data strobe signal is properly completed independently of signal disturbances in the control signal initiating the data strobe signal. Completion of the data strobe signal is announced by automatic turn-off of a return-response control signal.
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Anderson Tage O.
Fletcher James C. Administrator of the National Aeronautics and Space
Krass Errol A.
Manning John R.
McCaul Paul F.
Morrison Malcolm A.
Mott Monte F.
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