发明授权
US6072348A Programmable power reduction in a clock-distribution circuit 失效
时钟分配电路中的可编程功耗降低

Programmable power reduction in a clock-distribution circuit
摘要:
A clock distribution circuit and method for programmable ICs whereby the incoming clock frequency is optionally divided by two and distributed at the new, lower frequency. Programmable dual-edge/single-edge flip-flops are provided that optionally operate at twice the frequency of the distributed clock, being responsive to both rising and falling edges of the distributed clock. When the clock divider is enabled and the flip-flops are programmed as dual-edge, the operating frequency is the same as that of the incoming clock; however, the frequency of the distributed clock is reduced by one-half. This reduction halves the frequency at which the clock distribution circuits operate, and consequently approximately halves the power dissipated by the clock distribution circuit, thereby providing a programmable power-saving mode.
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