Title: Phase frequence detector capable of reducing dead zone range
Application Number: 200610162535 Application Date: 2006.11.27
Publication Number: 1960184 Publication Date: 2007.05.09
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03L7/085;H03L7/089;H03L7/08
Applicant(s) Name: VIA Tech Inc. Address:
Inventor(s) Name: Wu Pi
Attorney & Agent: wangzhi sen huangxiao lin
Abstract:
    The present invention provides a phase frequency detector which generates corresponding output signals at the first and the second output ends according to the input signals received at the first and the second input ends. The phase frequency detector includes: two latch circuits, two pulse generator, two twice inverting circuits, two detecting element, and a resetting control circuit. The detecting element detects the potential of the first end of the latch circuit to control the operation of the pulse generator. The inverting circuit generates the corresponding signals at the second end according to the first end potential and transmits the signals to the first and second output ends of the phase frequency detector. The resetting control circuit generates resetting signals according to the potential of the first and second output ends of said phase frequency detector.
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