JPH02816U - - Google Patents
Info
- Publication number
- JPH02816U JPH02816U JP7792688U JP7792688U JPH02816U JP H02816 U JPH02816 U JP H02816U JP 7792688 U JP7792688 U JP 7792688U JP 7792688 U JP7792688 U JP 7792688U JP H02816 U JPH02816 U JP H02816U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- current
- anode side
- diode
- 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
- 238000001514 detection method Methods 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
第１図は、この考案の検波回路の一実施例を示
す回路図、第２図は、従来の検波回路の説明図、
第３図は、そのダイオードの特性の説明図、第４
図は、従来の他の検波回路の説明図である。
１…ダイオード、２…バイアス抵抗、３…可変
定電圧源、４，８…コンデンサ、５…可変定電流
源、６…入力端子、７…出力端子、１０…検波回
路、１１，１２…ピークホールド回路、２０…検
波回路。
FIG. 1 is a circuit diagram showing an embodiment of the detection circuit of this invention, and FIG. 2 is an explanatory diagram of a conventional detection circuit.
Figure 3 is an explanatory diagram of the characteristics of the diode, Figure 4
The figure is an explanatory diagram of another conventional detection circuit. 1... Diode, 2... Bias resistor, 3... Variable constant voltage source, 4, 8... Capacitor, 5... Variable constant current source, 6... Input terminal, 7... Output terminal, 10... Detection circuit, 11, 12... Peak hold Circuit, 20...detection circuit.
Claims (1)
側へ直流バイアス電流を流して信号を検波する回
路であつて、前記アノード側及び前記カソード側
のいずれか一方に接続され、一方の電圧を調整す
る電圧調整回路と、前記アノード側及び前記カソ
ード側のいずれか他方に接続され、前記ダイオー
ドの順方向に流れる電流を調整する電流調整回路
とを有し、前記電圧調整回路により前記一方の電
圧を調整し、前記電流調整回路により前記ダイオ
ードの順方向電流を調整することで前記ダイオー
ドの入力電圧―出力電流特性の直線性特性のよい
領域にその動作点を移行させ、かつ無信号時の検
波出力電圧を基準レベル或いはその付近に設定す
ることを特徴とする検波回路。 (2) 一方は、アノード側であり、他方はカソー
ド側であつて、前記アノード側に接続された電圧
調整回路は可変定電流源を備え、前記カソード側
に接続された電圧調整回路は可変定電圧源を備え
、前記アノード側と接地との間には検波信号のピ
ーク値を保持するコンデンサが挿入され、超音波
のエコー受信信号を検波してピークホールド回路
に検波出力を送出することを特徴とする請求項１
記載の検波回路。[Claims for Utility Model Registration] (1) A circuit that detects a signal by flowing a DC bias current from the anode side to the cathode side of a detection diode, which is connected to either the anode side or the cathode side, a voltage adjustment circuit that adjusts one voltage; and a current adjustment circuit that is connected to the other of the anode side and the cathode side and adjusts the current flowing in the forward direction of the diode, and the voltage adjustment circuit By adjusting the one voltage and adjusting the forward current of the diode by the current adjustment circuit, the operating point of the diode is shifted to a region where the linearity characteristic of the input voltage-output current characteristic is good. A detection circuit characterized in that a detection output voltage at the time of a signal is set at or near a reference level. (2) One is an anode side and the other is a cathode side, the voltage regulation circuit connected to the anode side is equipped with a variable constant current source, and the voltage regulation circuit connected to the cathode side is equipped with a variable constant current source. A voltage source is provided, a capacitor for holding the peak value of the detected signal is inserted between the anode side and the ground, and the ultrasonic echo reception signal is detected and the detected output is sent to the peak hold circuit. Claim 1
The detection circuit described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7792688U JPH02816U (en) | 1988-06-13 | 1988-06-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7792688U JPH02816U (en) | 1988-06-13 | 1988-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02816U true JPH02816U (en) | 1990-01-05 |
Family
ID=31302883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7792688U Pending JPH02816U (en) | 1988-06-13 | 1988-06-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02816U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0415084U (en) * | 1990-05-23 | 1992-02-06 |
-
1988
- 1988-06-13 JP JP7792688U patent/JPH02816U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0415084U (en) * | 1990-05-23 | 1992-02-06 |
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