Title: Synchronizing signal detecting device
Application Number: 200610122115 Application Date: 2006.09.13
Publication Number: 1921309 Publication Date: 2007.02.28
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03K5/22
Applicant(s) Name: Huawei Technologies Co., Ltd. Address:
Inventor(s) Name: Li Ding
Attorney & Agent: hao chuanxin
Abstract:
    The invention relates to a synchronous signal detector, which comprises: edge detector for detecting the edge of input synchronous signal; clock generator for generating internal clock signal; impulse signal detector for generating set signal when receiving the impulse signal output by the edge detector and generating reset signal when receiving the voltage signal output by the edge detector; an output selector for selectively output the impulse signal or the internal clock signal based on the output signal of impulse signal detector. The invention has wide frequency width of detectable external synchronous signal and low demand on the internal clock signal.
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