JPH0469715U - - Google Patents
Info
- Publication number
- JPH0469715U JPH0469715U JP11387690U JP11387690U JPH0469715U JP H0469715 U JPH0469715 U JP H0469715U JP 11387690 U JP11387690 U JP 11387690U JP 11387690 U JP11387690 U JP 11387690U JP H0469715 U JPH0469715 U JP H0469715U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- amplifier
- amplified signal
- light
- inverting
- 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
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Optical Transform (AREA)
Description
第１図は本考案の光検出器を示す図、第２図は
第１図の各部波形を示す波形図、第３図は従来の
光検出器を示す図、第４図は第１図及び第３図の
各部波形を示す波形図である。
１……駆動回路、２……発光ダイオード、４…
…受光ダイオード、５……増幅器、８……パルス
遅延回路、９……微分回路、１２……反転増幅器
、１３……可変抵抗。
FIG. 1 is a diagram showing the photodetector of the present invention, FIG. 2 is a waveform diagram showing waveforms of each part of FIG. 1, FIG. 3 is a diagram showing a conventional photodetector, and FIG. FIG. 4 is a waveform diagram showing waveforms of various parts in FIG. 3; 1... Drive circuit, 2... Light emitting diode, 4...
...Photodetector diode, 5...Amplifier, 8...Pulse delay circuit, 9...Differentiating circuit, 12...Inverting amplifier, 13...Variable resistor.
Claims (1)
光ダイオードの発光信号を受ける受光ダイオード
と、該受光ダイオードの受光信号を増幅する増幅
器と、を備えた光検出器において、 前記駆動回路の駆動信号を微分する微分回路と
、 該微分回路の微分信号を反転する反転増幅器と
、 前記増幅器の増幅信号と前記反転増幅器の反転
増幅信号との位相を一致させるための位相一致回
路と、 位相の一致した前記増幅器の増幅信号と前記反
転増幅器の反転増幅信号とを加算する加算回路と
、を備え、 前記増幅器の増幅信号に含まれるノイズを除去
することを特徴とする光検出器。 (2) 前記反転増幅器は、前記反転増幅信号のレ
ベルを、前記増幅信号中のノイズを除去できるレ
ベルとするためのゲイン制御手段を含むことを特
徴とする請求項(1)記載の光検出器。[Claims for Utility Model Registration] (1) A photodetector comprising a light-receiving diode that receives a light-emitting signal from a light-emitting diode that operates based on a drive signal from a drive circuit, and an amplifier that amplifies the light-receiving signal from the light-receiving diode. , a differentiating circuit for differentiating the drive signal of the drive circuit, an inverting amplifier for inverting the differential signal of the differentiating circuit, and a phase for matching the phases of the amplified signal of the amplifier and the inverted amplified signal of the inverting amplifier. An optical device comprising: a matching circuit; and an adding circuit for adding together the phase-matched amplified signal of the amplifier and the inverted amplified signal of the inverting amplifier, and removes noise contained in the amplified signal of the amplifier. Detector. (2) The photodetector according to claim (1), wherein the inverting amplifier includes gain control means for adjusting the level of the inverting amplified signal to a level that can remove noise in the amplified signal. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11387690U JPH0469715U (en) | 1990-10-29 | 1990-10-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11387690U JPH0469715U (en) | 1990-10-29 | 1990-10-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0469715U true JPH0469715U (en) | 1992-06-19 |
Family
ID=31861501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11387690U Pending JPH0469715U (en) | 1990-10-29 | 1990-10-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0469715U (en) |
-
1990
- 1990-10-29 JP JP11387690U patent/JPH0469715U/ja active Pending
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