Programmable logic array with internally generated precharge and

Details Programmable logic array with internally generated precharge and Programmable logic array with internally generated precharge and

1991-10-11

1993-06-22

Hudspeth, David R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307443, 307469, 307481, H03K 19177

Patent

active

052218678

ABSTRACT:
Timing signals governing the precharge and evaluation phases of a PLA are generated by internal circuitry so that the PLA can be maintained in a fully static mode without destroying data integrity and without dissipating a significant amount of power. "Dummy" lines connected at every programmable intersection are added to the PLA to provide a measure of the maximum propagation delay. The evaluation phase of the PLA is terminated closely following the maximum propagation delay and precharging is begun soon thereafter. The timing ensures that evaluation completes, valid data is latched and the PLA is returned to a precharge condition even if the phase clock signals are suspended and regardless of the states of the phase clock signals when suspended.

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