JPS6027508Y2 - Ultrasonic oscillator - Google Patents
Ultrasonic oscillatorInfo
- Publication number
- JPS6027508Y2 JPS6027508Y2 JP12835978U JP12835978U JPS6027508Y2 JP S6027508 Y2 JPS6027508 Y2 JP S6027508Y2 JP 12835978 U JP12835978 U JP 12835978U JP 12835978 U JP12835978 U JP 12835978U JP S6027508 Y2 JPS6027508 Y2 JP S6027508Y2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- diode
- bias
- vibrator
- current
- 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.)
- Expired
Links
Landscapes
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Description
【考案の詳細な説明】
本考案は超音波発振回路のバイアス回路において、電力
損失を少なくした超音波発振装置を提供するものである
。[Detailed Description of the Invention] The present invention provides an ultrasonic oscillation device that reduces power loss in a bias circuit of an ultrasonic oscillation circuit.
以下添付図面をもとに説明する。This will be explained below based on the attached drawings.
図はコルピッツ型発振回路で、１は電源、２は振動子、
３は発振トランジスタ、４，５は発振に寄与するコンデ
ンサで、コンデンサ５は発振回路のベース回路とエミッ
タ回路間に接続している。The figure shows a Colpitts oscillator circuit, where 1 is the power supply, 2 is the resonator,
3 is an oscillation transistor, 4 and 5 are capacitors contributing to oscillation, and capacitor 5 is connected between the base circuit and emitter circuit of the oscillation circuit.
６は位相補正抵抗、７はチョークコイル、８はコンデン
サ５と並列接続したバイアス調整回路、９は発振起動用
抵抗である。6 is a phase correction resistor, 7 is a choke coil, 8 is a bias adjustment circuit connected in parallel with the capacitor 5, and 9 is an oscillation starting resistor.
従来、バイアス調整回路８は第３図に示すようにダイオ
ード１０と可変抵抗１１が直列接続されており、発振が
開始されると、振動子２を流れる電流は、コンデンサ５
を通じて流れる。Conventionally, the bias adjustment circuit 8 has a diode 10 and a variable resistor 11 connected in series as shown in FIG.
flows through.
この時、バイアス回路８のダイオード１０によって、こ
の電流の逆方向はバイパスされる。At this time, the reverse direction of this current is bypassed by the diode 10 of the bias circuit 8.
従って、コンデンサ５には、このバイパス分だけ正にチ
ャージされることになり、発振起動用抵抗９に大きな定
格の物を使う必要なしにトランジスタ３にバイアスを与
えることができ、又抵抗１１によってこの質を容易に可
変できる特長を有している。Therefore, the capacitor 5 is positively charged by the amount of this bypass, and it is possible to bias the transistor 3 without using a large rated resistor 9 for oscillation starting. It has the feature that the quality can be easily varied.
しかしながら、この時、バイアス値が振動子２の電流と
対応するため、振動子２の負荷変動により、電流値が増
大しかつこの増大がバイアスの増大となり、更に振動子
電流の増大となるため、異常電流を発生し、振動子２に
悪影響をおよぼすおそれがあった。However, at this time, since the bias value corresponds to the current of the vibrator 2, the current value increases due to load fluctuations of the vibrator 2, and this increase causes an increase in the bias, which further increases the vibrator current. There was a risk that an abnormal current would be generated and adversely affect the vibrator 2.
本考案の実施例ではバイアス調整回路８を第２図のよう
にしているもので、１２は従来例のダイオード１０のか
わりに用いられ、かつ負荷変動に対してリミッタ効果を
付加させるためのツェナーダイオード、１３はツェナー
ダイオード１２と直列の可変抵抗、１４は一方向に対し
てリミッタ効果を与えるためのダイオードで、可変抵抗
１３と並列接続されている。In the embodiment of the present invention, the bias adjustment circuit 8 is as shown in FIG. 2, and 12 is a Zener diode used in place of the diode 10 in the conventional example, and for adding a limiter effect to load fluctuations. , 13 is a variable resistor connected in series with the Zener diode 12, and 14 is a diode for providing a limiter effect in one direction, which is connected in parallel with the variable resistor 13.
上記の回路構成ではバイパス効果がツェナーダイオード
１２の順方向によって行なわれ、バイアス電流を得、か
つ振動子２のインピーダンス変動によって、大電流が流
れると、コンデンサ５の両端電圧の増大となるのである
が、ツェナーダイオード１２、及びダイオード１４によ
ってクリップされるので、振動子電流の異常な増大を起
こさないため、振動子２に悪影響をおよぼさない。In the above circuit configuration, the bypass effect is performed by the forward direction of the Zener diode 12, and when a bias current is obtained and a large current flows due to the impedance fluctuation of the vibrator 2, the voltage across the capacitor 5 increases. , the Zener diode 12, and the diode 14, the vibrator current does not increase abnormally, and the vibrator 2 is not adversely affected.
上記のように、本考案の超音波発振装置によれば、リミ
ッタ効果を有するため、負荷変動に対して異常電流が発
生し振動子に悪影響をおよぼすことがないので、バイア
ス回路に高ワツトの抵抗を使用し、特に電源直結等の高
電圧回路におけるバイアス回路の電力ロスを有すること
がないというすぐれた効果を得ている。As mentioned above, the ultrasonic oscillator of the present invention has a limiter effect, so abnormal current is not generated in response to load fluctuations and does not adversely affect the vibrator, so a high wattage resistor is used in the bias circuit. By using this, an excellent effect has been obtained in that there is no power loss in the bias circuit especially in high voltage circuits such as those directly connected to the power supply.
第１図は本考案装置の一実施例を示す回路図、第２図は
バイアス調整回路、第３図は従来のバイアス調整回路で
ある。
１・・・・・・電源、２・・・・・・振動子、３・・・
・・・トランジスタ、４，５・・・・・・コンデンサ、
８・・・・・・バイアス調整回路、１２・・・・・・ツ
ェナーダイオード、１３・・・・・・可変抵抗、１４・
・・・・・ダイオード。FIG. 1 is a circuit diagram showing an embodiment of the device of the present invention, FIG. 2 is a bias adjustment circuit, and FIG. 3 is a conventional bias adjustment circuit. 1... Power supply, 2... Vibrator, 3...
...Transistor, 4,5...Capacitor,
8... Bias adjustment circuit, 12... Zener diode, 13... Variable resistor, 14...
·····diode.
Claims (1)
イオードのアノードに接続し、前記可変抵抗の他端を前
記ダイオードのカソードに接続してなるバイアス調整回
路を、発振回路のベース回路とエミッタ回路間のコンデ
ンサに並列に、前記ツェナーダイオードのカソードをベ
ース回路側に、前記ダイオードのカソードをエミッタ回
路側に接続した超音波発振装置。A bias adjustment circuit in which the anode of a Zener diode is connected to one end of a variable resistor and the anode of the diode, and the other end of the variable resistor is connected to the cathode of the diode is connected to a capacitor between the base circuit and the emitter circuit of the oscillation circuit. An ultrasonic oscillation device in which the cathode of the Zener diode is connected to the base circuit side and the cathode of the diode is connected to the emitter circuit side in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12835978U JPS6027508Y2 (en) | 1978-09-18 | 1978-09-18 | Ultrasonic oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12835978U JPS6027508Y2 (en) | 1978-09-18 | 1978-09-18 | Ultrasonic oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5546515U JPS5546515U (en) | 1980-03-26 |
| JPS6027508Y2 true JPS6027508Y2 (en) | 1985-08-19 |
Family
ID=29091975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12835978U Expired JPS6027508Y2 (en) | 1978-09-18 | 1978-09-18 | Ultrasonic oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6027508Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61277558A (en) * | 1985-05-31 | 1986-12-08 | Isowa Ind Co | Removing method for defective sheet |
-
1978
- 1978-09-18 JP JP12835978U patent/JPS6027508Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5546515U (en) | 1980-03-26 |
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