Title:
【発明の名称】関数発生回路、水晶発振装置及び水晶発振装置の調整方法
Document Type and Number:
Japanese Patent JP3160299
Kind Code:
B2
Abstract:
A temperature compensating crystal oscillation device includes a constant voltage circuit for outputting a predetermined voltage independent of the ambient temperature, a temperature sensor circuit for outputting a voltage in proportion to the ambient temperature, and a control circuit for receiving the constant voltage output from the constant voltage circuit and the voltage output in proportion to the temperature from the temperature sensor circuit and for generating a control voltage (Vc) used for compensating a temperature characteristic of a quartz oscillator in the entire range of the ambient temperature through polygonal lines approximation of a negative cubic curve by using continuous lines. Furthermore, the crystal oscillation device includes a VCXO whose oscillation frequency is controlled to be a predetermined value by the control voltage (Vc).
More Like This:
Inventors:
Shuju Shibuya
Takeuchi Hisato
Junichi Matsuura
Yuichi Tateyama
Takaharu Saeki
Takeuchi Hisato
Junichi Matsuura
Yuichi Tateyama
Takaharu Saeki
Application Number:
JP50844199A
Publication Date:
April 25, 2001
Filing Date:
July 08, 1998
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H03B5/32; G06G7/12; G06G7/26; H03B5/04; H03B5/36; H03L1/02; H03B1/00; (IPC1-7): H03B5/32; G06G7/12
Domestic Patent References:
| JP48101860A | ||||
| JP9153104A | ||||
| JP8116214A | ||||
| JP1265708A |
Other References:
青木英彦「アナログＩＣの機能回路設計入門」ＣＱ出版，（１９９２），ｐｐ．１８７−２００
Attorney, Agent or Firm:
Hiroshi Maeda (1 person outside)