JPH0181018U - - Google Patents
Info
- Publication number
- JPH0181018U JPH0181018U JP1987176194U JP17619487U JPH0181018U JP H0181018 U JPH0181018 U JP H0181018U JP 1987176194 U JP1987176194 U JP 1987176194U JP 17619487 U JP17619487 U JP 17619487U JP H0181018 U JPH0181018 U JP H0181018U
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- voltage
- circuit
- variable capacitance
- capacitance element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000013078 crystal Substances 0.000 claims description 9
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Description
第１図は本考案の温度補償型水晶発振回路、第
２図は、本考案の他の実施例を示す温度補償回路
、第３図は従来の温度補償型水晶発振回路、第４
図は、ダイオードへ印加される制御電圧と周囲温
度との関係を示すグラフ。
図中、１，１０は固定抵抗、２，９はサーミス
タ、７，８，１３，１４はバイアス抵抗、４，１
２は制御電圧検出用トランジスタ、１６はダイオ
ード、１７は水晶発振回路、１８は水晶振動子で
ある。
FIG. 1 shows a temperature compensated crystal oscillator circuit of the present invention, FIG. 2 shows a temperature compensated circuit showing another embodiment of the present invention, FIG. 3 shows a conventional temperature compensated crystal oscillator circuit, and FIG.
The figure is a graph showing the relationship between the control voltage applied to the diode and the ambient temperature. In the figure, 1 and 10 are fixed resistors, 2 and 9 are thermistors, 7, 8, 13, and 14 are bias resistors, and 4, 1
2 is a control voltage detection transistor, 16 is a diode, 17 is a crystal oscillation circuit, and 18 is a crystal resonator.
Claims (1)
素子からの制御電圧を電圧可変容量素子に印加し
て、周囲温度変化による発振周波数変化を補償す
る温度補償回路とから構成される温度補償型水晶
発振回路に於いて、前記水晶振動子に前記電圧可
変容量素子を接続し、該電圧可変容量素子のアノ
ード及びカソードのそれぞれに固定電圧を与える
バイアス手段を接続し、周囲温度が異なる２つの
所定値を超えた範囲で、前記感熱抵抗素子が発生
する電圧を、前記バイアス手段のそれぞれに印加
するようにしたことを特徴とする温度補償型水晶
発振回路。 A temperature-compensated crystal oscillator consisting of a crystal oscillator circuit having a crystal resonator and a temperature compensation circuit that applies a control voltage from a heat-sensitive resistance element to a voltage variable capacitance element to compensate for changes in oscillation frequency due to changes in ambient temperature. In the circuit, the voltage variable capacitance element is connected to the crystal resonator, bias means for applying a fixed voltage is connected to each of the anode and cathode of the voltage variable capacitance element, and two predetermined values having different ambient temperatures are set. A temperature-compensated crystal oscillation circuit characterized in that a voltage generated by the heat-sensitive resistance element is applied to each of the bias means within a range exceeding the temperature range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987176194U JPH0181018U (en) | 1987-11-18 | 1987-11-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987176194U JPH0181018U (en) | 1987-11-18 | 1987-11-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0181018U true JPH0181018U (en) | 1989-05-31 |
Family
ID=31467944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987176194U Pending JPH0181018U (en) | 1987-11-18 | 1987-11-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0181018U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005020427A1 (en) * | 2003-08-21 | 2005-03-03 | Murata Manufacturing Co., Ltd. | Temperature compensated piezoelectric oscillator and electronic apparatus comprising it |
-
1987
- 1987-11-18 JP JP1987176194U patent/JPH0181018U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005020427A1 (en) * | 2003-08-21 | 2005-03-03 | Murata Manufacturing Co., Ltd. | Temperature compensated piezoelectric oscillator and electronic apparatus comprising it |
| US7205858B2 (en) | 2003-08-21 | 2007-04-17 | Murata Manufacturing Co., Ltd. | Temperature compensated piezoelectric oscillator and electronic apparatus comprising it |
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