International Business Machines Corporation

Vincent F Sollitto

Clive A Collins

An automatic clock tuning and measuring system is provided for data processing system wherein fixed frequency clock pulses are selectively delayed and distributed in accordance with a clock path and delay selection made by a computing means. A reference generator is connected to the fixed frequency clock pulses source for delaying the clock pulses a reference amount which is selected by the computing means in accordance with the predetermined delay associated with the selected path. An automatic time measuring means is connected to both the reference generator and the clock distribution means for providing an output indicative of the time comparison condition of a delayed clock pulse and the reference delayed clock pulse. The output time comparison or non-comparison of the delayed clock pulse and the reference delayed clock pulse is utilized through the computer means to adjust the amount of delay introduced by the automatic delay means or is utilized to adjust the delay increment established in the reference generator to provide the clock tuning and measuring respectively.

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Rhinecliff, NY, United States of America

Vincent F Sollitto