JPH01117784U - - Google Patents
Info
- Publication number
- JPH01117784U JPH01117784U JP873388U JP873388U JPH01117784U JP H01117784 U JPH01117784 U JP H01117784U JP 873388 U JP873388 U JP 873388U JP 873388 U JP873388 U JP 873388U JP H01117784 U JPH01117784 U JP H01117784U
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric vibrator
- capacitor
- semiconductor
- diode
- emitter
- 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
- 239000003990 capacitor Substances 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Transducers For Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
第１図はこの考案の一実施例を示す回路図、第
２図はこの考案の他の実施例を示す回路図、第３
図は圧電振動子の動作波形、第４図は従来のパル
ス発生回路の回路図、第５図は従来の圧電振動子
の動作波形である。
図において、１は第１半導体、２は圧電振動子
、３はダイオード、４は第２半導体、５はコンデ
ンサ、６は同軸ケーブル、７は入力端子、８は受
信回路、Ｃ１，Ｃ２はコンデンサ、Ｒ１，Ｒ２，
Ｒ３は抵抗器である。なお、各図中同一符号は同
一または相当部分を示す。
Figure 1 is a circuit diagram showing one embodiment of this invention, Figure 2 is a circuit diagram showing another embodiment of this invention, and Figure 3 is a circuit diagram showing another embodiment of this invention.
The figure shows operating waveforms of a piezoelectric vibrator, FIG. 4 is a circuit diagram of a conventional pulse generating circuit, and FIG. 5 shows operating waveforms of a conventional piezoelectric vibrator. In the figure, 1 is a first semiconductor, 2 is a piezoelectric vibrator, 3 is a diode, 4 is a second semiconductor, 5 is a capacitor, 6 is a coaxial cable, 7 is an input terminal, 8 is a receiving circuit, C 1 and C 2 are Capacitor, R 1 , R 2 ,
R3 is a resistor. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
が放電しダイオードを介して励振される圧電振動
子から超音波パルスを送信するパルス発生回路に
おいて、 該圧電振動子と並列にコレクタとエミツタが接
続されコレクタとベース間に抵抗器がまたベース
とエミツタ間に上記コンデンサの放電電流を導電
する極性に該ダイオードを設けて、上記コンデン
サの放電から上記圧電振動子の固有共振周波数の
半周期後に導通する第２半導体を備えたことを特
徴とするパルス発生回路。[Claims for Utility Model Registration] In a pulse generation circuit that transmits ultrasonic pulses from a piezoelectric vibrator that is excited via a diode by discharging the charge in a capacitor due to the conduction of a first semiconductor, in parallel with the piezoelectric vibrator. The collector and emitter are connected, a resistor is connected between the collector and the base, and the diode is provided between the base and the emitter with a polarity that conducts the discharge current of the capacitor, so that the natural resonant frequency of the piezoelectric vibrator is controlled from the discharge of the capacitor. A pulse generating circuit comprising a second semiconductor that becomes conductive after a half cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP873388U JPH0449593Y2 (en) | 1988-01-26 | 1988-01-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP873388U JPH0449593Y2 (en) | 1988-01-26 | 1988-01-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01117784U true JPH01117784U (en) | 1989-08-09 |
| JPH0449593Y2 JPH0449593Y2 (en) | 1992-11-20 |
Family
ID=31214868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP873388U Expired JPH0449593Y2 (en) | 1988-01-26 | 1988-01-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0449593Y2 (en) |
-
1988
- 1988-01-26 JP JP873388U patent/JPH0449593Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0449593Y2 (en) | 1992-11-20 |
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