Automatic frequency control apparatus for determining loop...

Details Automatic frequency control apparatus for determining loop... Automatic frequency control apparatus for determining loop...

2006-08-29

2006-08-29

Urban, Edward F. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S180300, C455S260000, C331S175000, C331S00100A, C331S17700V

Reexamination Certificate

active

07099639

ABSTRACT:
An automatic frequency control apparatus includes a mixer, a phase error detector, an absolute value converter, a determination unit, a multiplier and an oscillator. The mixer performs a frequency alternation of a phase modulated signal received thereto based on a frequency of a carrier signal. The phase error detector generates a carrier phase error. The absolute value converter calculates an absolute value of the phase error. The determination compares the absolute value with predetermined threshold values and generates loop gain based on the comparison. The multiplier generates a correction value based on the phase error and the loop gain. The oscillator generates the carrier signal based on the correction value.

REFERENCES:
patent: 3911219 (1975-10-01), Mullins
patent: 5200712 (1993-04-01), Srivastava
patent: 5764102 (1998-06-01), Cochran et al.
patent: 6097768 (2000-08-01), Janesch et al.
patent: 6341123 (2002-01-01), Tsujishita et al.
patent: 6633616 (2003-10-01), Crawford
patent: 6683921 (2004-01-01), Shiraishi et al.
patent: 2003/0161235 (2003-08-01), Baba
patent: 2003/0202496 (2003-10-01), Kluge et al.

Affiliated with

Also associated with

Rating

Automatic frequency control apparatus for determining 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 Automatic frequency control apparatus for determining loop..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic frequency control apparatus for determining loop... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3697454