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US 5,172,010 AGranted
Clock chopper/stretcher for high end machines
AssigneeInternational Business Machines Corporation
InventorFrank A. Montegari
Life of this patent
Estimating the term…
Abstract
A chopper/stretcher circuit provides on-chip clock distribution with minimum insertion delay. The on-chip clock chopper/stretcher circuit triggers only on the transition of an off-chip generated clock input and determines the generated pulse width of the clock by means of an on-chip delay line. The circuit introduces only one stage of delay in the clock path.
Claims7
An on-chip clock chopper/stretcher circuit for supplying clock pulses to on-chip circuits requiring clocking, said circuit comprising:
- receiver means for receiving and chopping an off-chip generated system clock signal;
- latch means coupled to an output of said receiver means, said latch means being set by said receiver means on a transition of said system clock signal and providing a latched output signal to said receiver means;
- clock driver means coupled to said output of said receiver means, said clock driver means driving said on-chip circuits, said receiver in combination with said clock driver means introducing only one stage delay in a clock path to said on-chip circuits;
- delay line means connected to an output of said clock driver means for generating an output signal defining a predetermined clock width;
- and
- reset means responsive to output signal of said delay line means for resetting said latch means.
3 more elements
Dependencies are inferred from the claim text.