Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2004-12-28
2009-10-20
Le, Lana N (Department: 2614)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
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.
Matsumoto Mariko
Ono Shigeru
Foley & Lardner LLP
Le Lana N
NEC Corporation
LandOfFree
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.
Profile ID: LFUS-PAI-O-4056111