发明授权
- 专利标题: Deglitch circuit removing glitches from input clock signal
- 专利标题(中): Deglitch电路从输入时钟信号中去除毛刺
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申请号: US10752785申请日: 2004-01-05
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公开(公告)号: US08319524B1公开(公告)日: 2012-11-27
- 发明人: Chi Fung Cheng , Pantas Sutardja
- 申请人: Chi Fung Cheng , Pantas Sutardja
- 申请人地址: BM Hamilton
- 专利权人: Marvell International Ltd.
- 当前专利权人: Marvell International Ltd.
- 当前专利权人地址: BM Hamilton
- 主分类号: G01R29/02
- IPC分类号: G01R29/02
摘要:
An apparatus, method, and system for removing glitches from a clock signal, including a duty cycle lock loop (DCLL) circuit. A glitch, which may produce errors in the clock signal, may occur when a read channel transitions from an acquired clock signal to an adjusted clock signal. In one embodiment of the inventive deglitch circuit, a first capacitor is charged and discharged in response to an input clock signal, and an output clock signal is provided depending upon the first capacitor's voltage. The output clock signal further charges and discharges a second capacitor whose ratio of charge to discharge currents provides a signal to bias the discharge current of the first capacitor. A second DCLL circuit may be provided to restore the output clock signal duty cycle to the original clock signal duty cycle.
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