Patent ID: 8212585
Filing Date: 2012-07-03
Classification: H03K

Abstract:
1. A programmable logic device including a logic block, a pre-charge driving device and a routing network, pre-charge driving device comprising: a first selecting device for selecting one of a plurality of delayed clock signals; a pre-charge drive signal generator outputting a pre-charge drive signal based upon the selected one of the plurality of delayed clock signals and a master clock signal; a second selecting device for selecting one of the pre-charge drive signal or a constant signal; and an output circuit for generating a pre-charge output signal to the routing network based upon an output signal of the second selecting device and a logic delay output signal received from the logic block, wherein the pre-charge drive signal generator is configured to generate the pre-charge drive signal for a time duration starting from the beginning of a clock cycle indicated by the master clock signal to a delay time corresponding to the selected one of the plurality of delayed clock signals.