Portable radio terminal and AFC control method

Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C455S192200, C455S184100, C455S255000

Reexamination Certificate

active

07606545

ABSTRACT:
A portable radio terminal for realizing automatic frequency control (AFC) for automatically controlling the oscillation frequency of an oscillator includes a unit for intermittently performing AFC operation, and a unit for shortening an AFC operation stop period when the frequency shift of the oscillation frequency is large. An AFC control method is also disclosed.

REFERENCES:
patent: 4633422 (1986-12-01), Brauer
patent: 4791386 (1988-12-01), Shiga
patent: 4817197 (1989-03-01), Shimizu et al.
patent: 5335354 (1994-08-01), Koike
patent: 5457716 (1995-10-01), Ang et al.
patent: 5475710 (1995-12-01), Ishizu et al.
patent: 5515401 (1996-05-01), Takenaka et al.
patent: 5524029 (1996-06-01), Takenaka et al.
patent: 5526383 (1996-06-01), Takenaka et al.
patent: 5550812 (1996-08-01), Philips
patent: 5633898 (1997-05-01), Kishigami et al.
patent: 5634205 (1997-05-01), Kurisu et al.
patent: 5875388 (1999-02-01), Daughtry et al.
patent: 5940748 (1999-08-01), Daughtry et al.
patent: 6233292 (2001-05-01), Van Bezooijen et al.
patent: 6275699 (2001-08-01), Ichihara
patent: 2004/0180630 (2004-09-01), Ichihara
patent: 11 09 223 (1961-06-01), None
patent: 0 252 444 (1988-01-01), None
patent: 494 734 (1938-10-01), None
patent: 494734 (1938-10-01), None
patent: 58-020022 (1983-02-01), None
patent: 63-246060 (1988-10-01), None
patent: 63-256010 (1988-10-01), None
patent: 05-063633 (1993-03-01), None
patent: 05-300183 (1993-11-01), None
patent: 08-032507 (1996-02-01), None
patent: 08-223063 (1996-08-01), None
patent: 09-130372 (1997-05-01), None
patent: 10-164658 (1998-06-01), None
patent: 10-210563 (1998-08-01), None
patent: 10-229491 (1998-08-01), None
patent: 10-242885 (1998-09-01), None
patent: 10-308289 (1999-11-01), None
patent: 2000-049647 (2000-02-01), None
patent: 2000-124825 (2000-04-01), None
W.C. Lindsey et al., “A Survey of Digital Phase-Locked Loops,” Proceedings of the IEEE, vol. 69:4, Apr. 1981, pp. 410-431.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Portable radio terminal and AFC control method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Portable radio terminal and AFC control method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable radio terminal and AFC control method will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4056111

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.