The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 18, 2012
Filed:
Oct. 15, 2009
Allan Thomas Davidson, San Jose, CA (US);
Marwan A. Khalaf, San Carlos, CA (US);
Daniel Bowersox, Somerset, PA (US);
Michael Menghui Zheng, Fremont, CA (US);
Neville Carvalho, Campbell, CA (US);
Allan Thomas Davidson, San Jose, CA (US);
Marwan A. Khalaf, San Carlos, CA (US);
Daniel Bowersox, Somerset, PA (US);
Michael Menghui Zheng, Fremont, CA (US);
Neville Carvalho, Campbell, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
A digital phase detector circuit and corresponding monitor and control logic is presented. The digital phase detector has two storage elements, where the data input of the first storage element receives a first clock signal and the data input of the second storage element receives a second clock signal. A time shifter shifts the second clock signal by a shift period, and transmits the shifted signal to the clock input of the storage elements. The signals applied to the data inputs are transmitted from the storage elements when the clock input receives the shifted second clock signal from the time shifter. A monitor and control module samples the data output from the storage elements after each shifted second clock signal is transmitted by the time shifter. The sampling of the output data provides the data used to determine the time relationship between the first and the second clock signals.