Title:
DIGITAL BROADCAST RECEIVER
Document Type and Number:
WIPO Patent Application WO/2001/061874
Kind Code:
A1
Abstract:
When the system starts initially, a system controller (10) corrects the initial value stored in a memory (9) and corresponding to the initial voltage value for initial start by using error information stored in a memory (14) and corresponding to the previous reception frequency. A control voltage converting circuit (15) converts the corrected initial value to the initial voltage value. A D/A converter (11) supplies converted analog initial voltage value to a voltage-controlled crystal oscillator (12) to produce an oscillation frequency at the initial start. The control voltage used except for the initial start is generated by an automatic frequency control circuit (8), and is supplied to the crystal oscillator (12). When the reception ends, error information obtained by the automatic frequency control circuit (8) is stored in the memory (14) under control of the system controller (10).
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Inventors:
TAKEUCHI MITSURU
MORITA MASAKAZU
MORITA MASAKAZU
Application Number:
PCT/JP2000/000909
Publication Date:
August 23, 2001
Filing Date:
February 17, 2000
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H03J1/00; H03J7/04; (IPC1-7): H04B1/26; H03J7/02; H04B1/16
Foreign References:
| JPH1098355A | 1998-04-14 | |||
| JPH09275372A | 1997-10-21 | |||
| JPH10284997A | 1998-10-23 | |||
| JPH09312627A | 1997-12-02 | |||
| JPH10200592A | 1998-07-31 | |||
| US5428405A | 1995-06-27 | |||
| JPH1098355A | 1998-04-14 | |||
| JPH10284997A | 1998-10-23 | |||
| JPH09312627A | 1997-12-02 | |||
| JPH10200592A | 1998-07-31 |
Other References:
See also references of EP 1172938A4
Attorney, Agent or Firm:
Tazawa, Hiroaki (Kasumigaseki 3-chome Chiyoda-ku Tokyo, Kasumigaseki 3-chome Chiyoda-ku Tokyo, JP)
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