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Title:
FREQUENCY CORRECTION METHOD, APPARATUS, AND MOBILE TERMINAL
Document Type and Number:
Japanese Patent JP2004282118
Kind Code:
A
Abstract:

To provide a frequency correction method and apparatus for always preventing the frequency of an oscillator from changing by temperature variations and over aging and keeping it within a proper range and to provide a mobile terminal capable of always keeping the reference frequency within a proper range.

A storage means 113 records at least one control information item to the oscillator 106 in the past. A processing means 108 calculates the change over aging in the frequency of the oscillator 106 from at least one control information item in the past. Then the processing means 108 gives new control information to correct the calculated change over aging to the oscillator 106.


Inventors:
ICHIHARA MASAKI
Application Number:
JP2003066565A
Publication Date:
October 07, 2004
Filing Date:
March 12, 2003
Export Citation:
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Assignee:
NEC CORP
International Classes:
H03B1/00; H03B5/04; H03B5/32; H03J1/00; H03J7/04; H03L1/02; H03L7/08; H03L7/16; H04B1/04; H04B1/26; H04B1/3822; H04B1/40; (IPC1-7): H03B5/32; H03B1/00; H03B5/04; H03L7/08; H04B1/04; H04B1/26; H04B1/40
Attorney, Agent or Firm:
Nobuyuki Kaneda
Katsuhiro Ito
Ishibashi Masayuki