发明授权
- 专利标题: Programmable power reduction in a clock-distribution circuit
- 专利标题(中): 时钟分配电路中的可编程功耗降低
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申请号: US890952申请日: 1997-07-09
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公开(公告)号: US6072348A公开(公告)日: 2000-06-06
- 发明人: Bernard J. New , Trevor J. Bauer , Steven P. Young
- 申请人: Bernard J. New , Trevor J. Bauer , Steven P. Young
- 申请人地址: CA San Jose
- 专利权人: Xilinx, Inc.
- 当前专利权人: Xilinx, Inc.
- 当前专利权人地址: CA San Jose
- 主分类号: G06F1/08
- IPC分类号: G06F1/08 ; G06F1/32 ; H03K1/04
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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