Portable radio terminal and AFC control method

Details Portable radio terminal and AFC control method Portable radio terminal and AFC control method

2007-12-04

2007-12-04

Le, Lana (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S260000, C455S182200

Reexamination Certificate

active

11022815

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: 3867568 (1975-02-01), Merriweather
patent: 4123716 (1978-10-01), Borg
patent: 4496978 (1985-01-01), Sakamoto et al.
patent: 4817197 (1989-03-01), Shimizu et al.
patent: 5060292 (1991-10-01), Ayukawa et al.
patent: 5416779 (1995-05-01), Barnes 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: 5600672 (1997-02-01), Oshima et al.
patent: 5627604 (1997-05-01), Krishnamurthy et al.
patent: 5633898 (1997-05-01), Kishigami et al.
patent: 5634205 (1997-05-01), Kurisu et al.
patent: 5940748 (1999-08-01), Daughtry et al.
patent: 5987313 (1999-11-01), Lee
patent: 6233292 (2001-05-01), Van Bezooijen et al.
patent: 6275699 (2001-08-01), Ichihara
patent: 6693978 (2004-02-01), Horii et al.
patent: 0 252 444 (1988-01-01), None
patent: 494734 (1938-10-01), None
patent: 63-256010 (1988-10-01), None
patent: 63246060 (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.

Affiliated with

Also associated with

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

Comments { 0 }

Profile ID: LFUS-PAI-O-3895928