发明授权
US07421053B1 Fast clock acquisition enable method using phase stir injection to PLL for burst mode optical receivers 失效
快速时钟采集启用方法,使用相位搅拌注入到突发模式光接收器的PLL

Fast clock acquisition enable method using phase stir injection to PLL for burst mode optical receivers
摘要:
Systems and methods for aligning the phase of a PLL with an incoming data signal. In one embodiment, when a data signal is received in a PLL, a phase perturbation signal is generated and injected into the PLL. The PLL then performs a phase alignment procedure to lock on to the received data signal. The phase perturbation signal is a damped sinusoidal oscillation that is injected into the PLL when each of a plurality of data packets is received. The perturbation signal has an amplitude sufficient to bump the PLL out of a quasi-stable state around 180 degrees out of phase with the incoming data signal, but is damped to less than a degree of phase shift within 30 ns of being injected.
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