公开(公告)号：US08947167B2

公开(公告)日：2015-02-03

申请号：US13931189

申请日：2013-06-28

Applicant: Broadcom Corporation

Inventor： Mahyar Kargar ,  Siavash Fallahi ,  Namik Kocaman ,  Mehdi Khanpour ,  Afshin Momtaz

IPC: H03L7/091 ,  G01R23/02 ,  G01R25/00 ,  H03D13/00 ,  H03L7/00 ,  H03L7/08 ,  H03L7/113 ,  G01R23/15

CPC classification number: G01R23/02 ,  G01R23/15 ,  G01R25/00 ,  H03D13/00 ,  H03L7/00 ,  H03L7/0807 ,  H03L7/091 ,  H03L7/113 ,  H03L2207/06

Abstract: Embodiments provide a reference-less frequency detector that overcomes the “dead zone” problem of conventional circuits. In particular, the frequency detector is able to accurately resolve the polarity of the frequency difference between the VCO clock signal and the data signal, irrespective of the magnitude of the frequency difference and the presence of VCO clock jitter and/or ISI on the data signal.

Abstract translation: 实施例提供了一种克服常规电路的“死区”问题的无参考频率检测器。 特别地，频率检测器能够精确地解决VCO时钟信号和数据信号之间的频率差的极性，而不管频率差的大小和数据信号上是否存在VCO时钟抖动和/或ISI 。