JPH0486314U - - Google Patents
Info
- Publication number
- JPH0486314U JPH0486314U JP11464990U JP11464990U JPH0486314U JP H0486314 U JPH0486314 U JP H0486314U JP 11464990 U JP11464990 U JP 11464990U JP 11464990 U JP11464990 U JP 11464990U JP H0486314 U JPH0486314 U JP H0486314U
- Authority
- JP
- Japan
- Prior art keywords
- phase shifter
- acoustic wave
- surface acoustic
- phase
- oscillation frequency
- 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
- 238000010897 surface acoustic wave method Methods 0.000 claims description 13
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000010355 oscillation Effects 0.000 claims description 4
- 230000010363 phase shift Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Description
第１図はこの考案の一実施例による周囲の温度
変化に対し発振周波数を一定に保つ弾性表面波発
振器の構成を示す図、第２図はこの考案の別の実
施例の弾性表面波発振器を示す図、第３図は従来
の弾性表面波発振器を示す図、第４図ａ〜ｄは、
この考案の弾性表面波共振器と移相器の特性例を
示す図である。
図中１は弾性表面波共振器、２は弾性表面波共
振器１に接続された移相器、３は移相器２に接続
された増幅器、４は弾性表面波共振器１と増幅器
３に接続された電力分配器、５は電力分配器４に
接続された緩衝増幅器、６は弾性表面波発振器の
出力端子である。また７ａ，７ｂはコンデンサ、
８はコンデンサ７ａ，７ｂに接続されたコイル、
９ａ，９ｂは温度補償用コンデンサ、１０はコン
デンサ９ａ，９ｂに接続されたコイルである。な
お、図中、同一符号は同一、又は相当部分を示す
。
Figure 1 shows the configuration of a surface acoustic wave oscillator according to one embodiment of this invention that maintains the oscillation frequency constant against changes in ambient temperature, and Figure 2 shows the configuration of a surface acoustic wave oscillator according to another embodiment of this invention. 3 is a diagram showing a conventional surface acoustic wave oscillator, and FIG. 4 a to d are
FIG. 3 is a diagram showing an example of characteristics of the surface acoustic wave resonator and phase shifter of this invention. In the figure, 1 is a surface acoustic wave resonator, 2 is a phase shifter connected to the surface acoustic wave resonator 1, 3 is an amplifier connected to the phase shifter 2, and 4 is a surface acoustic wave resonator 1 and an amplifier 3. A connected power divider, 5 is a buffer amplifier connected to the power divider 4, and 6 is an output terminal of a surface acoustic wave oscillator. Also, 7a and 7b are capacitors,
8 is a coil connected to capacitors 7a and 7b;
9a and 9b are temperature compensation capacitors, and 10 is a coil connected to the capacitors 9a and 9b. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
正帰還回路を構成し、前記移相器の移相量を調整
することにより発振周波数を調整する弾性表面波
発振器において、前記移相器を、発振周波数を初
期設定する第１の移相部と、温度補償用コンデン
サから成る第２の移相部で構成したことを特徴と
する弾性表面波発振器。 (2) 弾性表面波共振器と、増幅器と、移相器で
正帰還回路を構成し、前記移相器の移相量を調整
することにより発振周波数を調整する弾性表面波
発振器において、前記移相器に、温度補償用コン
デンサを付加したことを特徴とする弾性表面波発
振器。[Claims for Utility Model Registration] (1) A positive feedback circuit is configured by a surface acoustic wave resonator, an amplifier, and a phase shifter, and the oscillation frequency is adjusted by adjusting the amount of phase shift of the phase shifter. A surface acoustic wave oscillator, characterized in that the phase shifter includes a first phase shifter that initializes the oscillation frequency, and a second phase shifter that includes a temperature compensation capacitor. . (2) A surface acoustic wave oscillator in which a positive feedback circuit is configured by a surface acoustic wave resonator, an amplifier, and a phase shifter, and the oscillation frequency is adjusted by adjusting the amount of phase shift of the phase shifter. A surface acoustic wave oscillator characterized by adding a temperature compensation capacitor to the phase converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11464990U JPH0486314U (en) | 1990-10-31 | 1990-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11464990U JPH0486314U (en) | 1990-10-31 | 1990-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0486314U true JPH0486314U (en) | 1992-07-27 |
Family
ID=31862355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11464990U Pending JPH0486314U (en) | 1990-10-31 | 1990-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0486314U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007124566A (en) * | 2005-10-31 | 2007-05-17 | Nippon Dempa Kogyo Co Ltd | Surface acoustic wave oscillator |
-
1990
- 1990-10-31 JP JP11464990U patent/JPH0486314U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007124566A (en) * | 2005-10-31 | 2007-05-17 | Nippon Dempa Kogyo Co Ltd | Surface acoustic wave oscillator |
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