JPS6064516A - Combined crystal resonator - Google Patents
Combined crystal resonatorInfo
- Publication number
- JPS6064516A JPS6064516A JP17338883A JP17338883A JPS6064516A JP S6064516 A JPS6064516 A JP S6064516A JP 17338883 A JP17338883 A JP 17338883A JP 17338883 A JP17338883 A JP 17338883A JP S6064516 A JPS6064516 A JP S6064516A
- Authority
- JP
- Japan
- Prior art keywords
- cut angle
- mode
- crystal resonator
- resonance frequency
- 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.)
- Granted
Links
- 239000013078 crystal Substances 0.000 title claims abstract description 17
- 238000005452 bending Methods 0.000 claims abstract description 15
- 230000010355 oscillation Effects 0.000 abstract 1
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/21—Crystal tuning forks
- H03H9/215—Crystal tuning forks consisting of quartz
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は屈曲モードと捩りモード振動が結合した結合水
晶振動子の切断角度に関する。本発明は屈曲、捩シ水晶
振動子の周波数温度特性に優した新カット角を提案する
ものである。腕時計用振動子として音叉廃屈曲水晶撮動
子が一般的に使用さｎている。しかし、このタイプの振
動子は周波数温度特性が２次曲線で表わさｎるため広い
温度範囲に互って零温度係数を与えることが出来ず、時
間精鹿に限界があった。そこで、最近は特開昭５５−７
５３２６で見らｎるように、屈曲モードに捩シモードを
結合させ、屈曲モードの周波数温度特性を改善し、優ｎ
た周波数温度特性を得ている。そして、この５ｒした周
波数温度特性を与えるカット角は音叉の辺比によって若
干異なるが約−１０°付近が使用さＴしている。Ｘ発明
はこｊＬら従来の屈曲、捩ｎ振動子の研究する中で、上
記カット角以外にも周波数温度特性に優７した新カット
角が存在することを見い出し′ｆｃ。以下、本発明につ
いて詳細に説明する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting angle of a coupled crystal resonator in which bending mode and torsional mode vibration are coupled. The present invention proposes a new cut angle that is superior to the frequency-temperature characteristics of bent and torsional crystal resonators. A bent crystal camera without a tuning fork is generally used as a vibrator for a wristwatch. However, since the frequency-temperature characteristic of this type of vibrator is represented by a quadratic curve, it is impossible to provide a zero temperature coefficient over a wide temperature range, and there is a limit to the time sensitivity. Therefore, recently, JP-A-55-7
As seen in 5326, the torsional mode is combined with the bending mode to improve the frequency-temperature characteristics of the bending mode.
The frequency-temperature characteristics are obtained. The cut angle that provides this 5r frequency-temperature characteristic varies slightly depending on the side ratio of the tuning fork, but around -10[deg.] is used. While researching conventional bending and torsional oscillators, X Invention discovered that there is a new cut angle that has superior frequency-temperature characteristics in addition to the above-mentioned cut angles. The present invention will be explained in detail below.
水晶振動子、特に、屈曲モードに捩シモードを結合させ
、この周波数温度特性の挙動を理論的に解析する試みは
未だ行なわ扛ていない。そこで、本発明は屈曲モードと
捩９モードの結合した屈曲、捩り水晶振動子について理
論解析を行ない、特に、振動子の寸法、カット角に対す
る周波数温度特性の関係全調査した。今、屈曲モードの
共振周波数をｆ ｙ、捩りモードの共振周波数をｆでと
すると屈曲モードに捩シモード撮動が結合して得らｎる
共振周波数ｆは次式のようになる。No attempt has yet been made to theoretically analyze the behavior of the frequency-temperature characteristics of a crystal resonator, especially by coupling the torsion mode to the bending mode. Therefore, the present invention conducted a theoretical analysis of a bending and torsional crystal resonator in which a bending mode and a torsional 9 mode are combined, and in particular, investigated the relationship between frequency temperature characteristics with respect to the dimensions and cut angle of the vibrator. Now, assuming that the resonant frequency of the bending mode is f y and the resonant frequency of the torsional mode is f, the resonant frequency f obtained by combining the bending mode and the torsional mode imaging is given by the following equation.
ｆ！τ） −（１）
但し、Ｖは無次元の値、Ｃは弾性結合因子本発明は（１
）式より、共振周波数ｆのティラー展開によフ、−次、
二次、三次温度係数をめている。第１図は本発明の音叉
型屈曲捩りモード水晶振動子の結晶軸との関係を示し、
音叉形状はｚ板から形成さｎ、音叉腕の長さｔ１腕幅Ｗ
１板厚ｔとからなっている。又、Ｘ軸の壕わシの回転は
反時計方向を正とし、時計方向を負とする。第２図は理
論解析によって得らｎた結果で、Ｗ＝０．３５鰭、Ｌ＝
０−９５ｗｍで厚みｔｔ−最適値にしたときの一次温度
係数αが零となる、カット角θによる二次温度係数βの
関係を示し、カット角−１０°付近でα、βともに零に
なシ、こｎが従来見い出さｎ使用さ扛ているカット角で
あシ、第２図から明らかなように、カット角が一５０°
付近にもα。f! τ) −(1) However, V is a dimensionless value, and C is an elastic coupling factor.
), the Tiller expansion of the resonant frequency f gives f, -th,
The second and third order temperature coefficients are calculated. FIG. 1 shows the relationship with the crystal axis of the tuning fork type bending torsion mode crystal resonator of the present invention,
The shape of the tuning fork is formed from the Z plate n, the length of the tuning fork arm is t1, the width of the arm is W
1 plate thickness t. Further, regarding the rotation of the trench on the X axis, the counterclockwise direction is positive and the clockwise direction is negative. Figure 2 shows the results obtained by theoretical analysis, W = 0.35 fin, L =
The relationship between the thickness tt and the secondary temperature coefficient β depending on the cut angle θ is shown in which the first temperature coefficient α becomes zero when the thickness tt is set to the optimum value at 0-95wm, and both α and β become zero at around the cut angle of −10°. This is the cut angle that is conventionally used.As is clear from Figure 2, the cut angle is 150°.
There is also α nearby.
βが同時に零となるカット角が存在することが分かる。It can be seen that there is a cut angle where β becomes zero at the same time.
又、このカット角は振動子の寸法等によって若干変化す
るが、本発明では、たとえ寸法を変えても、カット角が
一４０°〜−６０°の範囲内であｎばα、βを常に零に
することが小米る。以上、述べたように、本発明は屈曲
モードと捩りモード振動の結合した結合水晶振動子につ
いて理論解析を行ない。その結果、周波数温度特性に優
Ｉした水晶振動子を提供できる、新カット角を見い出し
た。Furthermore, this cut angle varies slightly depending on the dimensions of the vibrator, etc., but in the present invention, even if the dimensions are changed, if the cut angle is within the range of 40° to -60°, then α and β can always be maintained. It is possible to make it zero. As described above, the present invention performs a theoretical analysis of a coupled crystal resonator in which bending mode and torsional mode vibrations are coupled. As a result, we discovered a new cut angle that can provide a crystal resonator with excellent frequency-temperature characteristics.
第１図は音叉型水晶振動子と結晶軸との関係を示す。
坑２図は一次温度係数αが零のときのカット角θと二次
温度係数βとの関係を示す。
ｔ＝＝叉腕長さ
Ｗ＝音音叉輻
幅＝＝叉板厚
以上
出願人 株式会社第二精工舎
代理人 弁理士最上 務FIG. 1 shows the relationship between a tuning fork type crystal resonator and the crystal axis. Diagram 2 shows the relationship between the cut angle θ and the secondary temperature coefficient β when the primary temperature coefficient α is zero. t==Fork arm length W=Tuning fork width==Fork plate thickness or more Applicant Daini Seikosha Co., Ltd. Agent Patent attorney Tsutomu Mogami
Claims (1)
に於いて、前記水晶振動子は２板ｔｌ−ｘ軸を回転軸と
して一４０°〜−６０°回転した板よシ加工さｎている
ことを特徴とする結合水晶振動子。In a coupled crystal resonator in which bending mode and torsional mode vibration are combined, the crystal resonator is processed into two plates rotated by 140° to -60° with the tl-x axis as the rotation axis. A coupled crystal oscillator featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17338883A JPS6064516A (en) | 1983-09-20 | 1983-09-20 | Combined crystal resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17338883A JPS6064516A (en) | 1983-09-20 | 1983-09-20 | Combined crystal resonator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6064516A true JPS6064516A (en) | 1985-04-13 |
| JPH0329204B2 JPH0329204B2 (en) | 1991-04-23 |
Family
ID=15959472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17338883A Granted JPS6064516A (en) | 1983-09-20 | 1983-09-20 | Combined crystal resonator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6064516A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63202112A (en) * | 1987-02-17 | 1988-08-22 | Seiko Electronic Components Ltd | Coupling crystal vibrator |
| JPS63202113A (en) * | 1987-02-17 | 1988-08-22 | Seiko Electronic Components Ltd | Coupling crystal vibrator |
| US9331602B2 (en) | 2013-10-15 | 2016-05-03 | Seiko Epson Corporation | Vibrator, oscillator, electronic device, and moving object |
| JP2017536012A (en) * | 2014-10-03 | 2017-11-30 | テクノロギアン トゥトキムスケスクス ヴェーテーテー オイ | Temperature compensated beam resonator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56123116A (en) * | 1980-03-04 | 1981-09-28 | Citizen Watch Co Ltd | Tuning fork type quartz oscillator |
| JPS57203313A (en) * | 1981-06-09 | 1982-12-13 | Seiko Instr & Electronics Ltd | Tuning fork type quartz oscillator |
| JPS5857812A (en) * | 1981-10-02 | 1983-04-06 | Seiko Instr & Electronics Ltd | Tuning fork type bending crystal oscillator |
-
1983
- 1983-09-20 JP JP17338883A patent/JPS6064516A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56123116A (en) * | 1980-03-04 | 1981-09-28 | Citizen Watch Co Ltd | Tuning fork type quartz oscillator |
| JPS57203313A (en) * | 1981-06-09 | 1982-12-13 | Seiko Instr & Electronics Ltd | Tuning fork type quartz oscillator |
| JPS5857812A (en) * | 1981-10-02 | 1983-04-06 | Seiko Instr & Electronics Ltd | Tuning fork type bending crystal oscillator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63202112A (en) * | 1987-02-17 | 1988-08-22 | Seiko Electronic Components Ltd | Coupling crystal vibrator |
| JPS63202113A (en) * | 1987-02-17 | 1988-08-22 | Seiko Electronic Components Ltd | Coupling crystal vibrator |
| US9331602B2 (en) | 2013-10-15 | 2016-05-03 | Seiko Epson Corporation | Vibrator, oscillator, electronic device, and moving object |
| JP2017536012A (en) * | 2014-10-03 | 2017-11-30 | テクノロギアン トゥトキムスケスクス ヴェーテーテー オイ | Temperature compensated beam resonator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0329204B2 (en) | 1991-04-23 |
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