Digital frequency detector and digital phase locked loop...

Details Digital frequency detector and digital phase locked loop... Digital frequency detector and digital phase locked loop...

2008-01-09

2010-10-12

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By phase

C327S005000, C327S007000, C327S008000

Reexamination Certificate

active

07812644

ABSTRACT:
A digital frequency detector and a digital phase locked loop (PLL) are provided. The digital frequency detector includes a first conversion unit which outputs a first frequency as first frequency information of a digital type using a first ring oscillator that operates in a high-level period of the first frequency, a second conversion unit which outputs a second frequency as second frequency information of a digital type using a second ring oscillator that operates in a high-level period of the second frequency, and an operation unit which outputs a digital frequency for the first frequency by calculating a ratio of the first frequency information to the second frequency information.

REFERENCES:
patent: 5416444 (1995-05-01), Yamauchi et al.
patent: 6219394 (2001-04-01), Sander
patent: 6351164 (2002-02-01), Yoshie
patent: 6429693 (2002-08-01), Staszewski et al.
patent: 7084670 (2006-08-01), Chiu
patent: 7304510 (2007-12-01), Matsuta
patent: 2007/054902 (2007-05-01), None
Communication from the State Intellectual Property Office of P.R. China issued Jul. 20, 2010, in counterpart Chinese Application No. 200810107801.2

Affiliated with

Also associated with

Rating

Digital frequency detector and digital phase locked loop... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital frequency detector and digital phase locked loop..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital frequency detector and digital phase locked loop... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4159557