发明名称 Circuit to reset a phase locked loop after a loss of lock
摘要 A system and method for generating a reset signal within a Phase Locked Loop (PLL) circuit is described. The reset signal is generated by inputting a reference signal and a lock detect signal into reset circuitry. The reset circuitry within the PLL comprises a series of interconnected latches, or D flip-flops, which are used to create a delay time. The delay time is the amount of time the reset circuit will wait until the reset signal indicates a reset. The reset circuit may also generate a reset signal having a pulse width. The pulse width is determined by the series of interconnected latches. The reset signal may be used to reset a Voltage Controlled Oscillator (VCO) or other circuits within a PLL or it may be used by circuits external to the PLL.
申请公布号 US7423492(B2) 申请公布日期 2008.09.09
申请号 US20050254474 申请日期 2005.10.20
申请人 HONEYWELL INTERNATIONAL INC. 发明人 SEEFELDT JAMES D.
分类号 H03L7/095 主分类号 H03L7/095
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