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Title:
OSCILLATOR AND COMMUNICATION APPLIANCE
Document Type and Number:
WIPO Patent Application WO/2003/021765
Kind Code:
A1
Abstract:
An oscillator (10) comprises temperature compensation circuits (30) and (40), a frequency adjustment circuit (50), and an initial deviation correction circuit (60). A temperature compensation voltage (V1), a temperature compensation voltage (V2), a frequency adjustment voltage (V3) and an initial deviation correction voltage (V4) output from these circuits are selectively added by controlling switches (SW1−SW4) according to control data DC stored in a memory (90), and the sum voltage is supplied to a voltage control oscillation circuit (20) as a control voltage (VA).

Inventors:
OKA MANABU
ICHINOSE KAZUSHIGE
Application Number:
PCT/JP2002/007669
Publication Date:
March 13, 2003
Filing Date:
July 29, 2002
Export Citation:
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Assignee:
SEIKO EPSON CORP (JP)
International Classes:
H03B5/32; H03L1/02; H03B1/00; (IPC1-7): H03B5/32
Foreign References:
JPH0955624A1997-02-25
JPH04111505A1992-04-13
JPH08116214A1996-05-07
US3821665A1974-06-28
JPH1168461A1999-03-09
JP2001230630A2001-08-24
JPH10270942A1998-10-09
Other References:
Kenji NEMOTO, Ken-ichi SATO, "A 2.5 PPM Fully Integrated CMOS Analog TCXO", Proceedings of the 2001 IEEE International Frequency Control Symposium & PDA Exhibition, (6-8 June 2001, published in September 2001), pages 740 to 743
Kenji NEMOTO, "Analog Hoshiki CMOS TCXO", Heisei 13 nen (2001), Proceedings of the Electronics, Information and Systems Conference, separate Vol. 2, 06 September 2001, pages II-219 to II-220 (TC 11-3)
Attorney, Agent or Firm:
Kawasaki, Kenji (Toyo Bldg. 2-10 Nihonbashi 1-chome Chuo-ku, Tokyo, JP)
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