JPH0351526U - - Google Patents
Info
- Publication number
- JPH0351526U JPH0351526U JP1989111957U JP11195789U JPH0351526U JP H0351526 U JPH0351526 U JP H0351526U JP 1989111957 U JP1989111957 U JP 1989111957U JP 11195789 U JP11195789 U JP 11195789U JP H0351526 U JPH0351526 U JP H0351526U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- current
- light
- voltage
- output
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims 2
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Electronic Switches (AREA)
- Optical Communication System (AREA)
Description
第１図は本考案の具体的一実施例を示す光／電
圧変換回路のブロツク回路図、第２図は第１図の
説明に供されるタイムチヤート、第３図は従来の
光／電圧変換回路を示す図、第４図は第３図の説
明に供する図である。
ＨＤ……光−電流変換素子（フオトダイオード
）、１……電流／電圧変換回路（Ｉ／Ｖ変換回路
）、２……フイルタ回路、３……積分回路、４…
…サンプルホールド回路（Ｓ／Ｈ）、５……出力
端。
Fig. 1 is a block circuit diagram of a light/voltage conversion circuit showing a specific embodiment of the present invention, Fig. 2 is a time chart used to explain Fig. 1, and Fig. 3 is a conventional light/voltage conversion circuit. FIG. 4, a diagram showing the circuit, is a diagram for explaining FIG. 3. HD...Light-current conversion element (photodiode), 1...Current/voltage conversion circuit (I/V conversion circuit), 2...Filter circuit, 3...Integrator circuit, 4...
...Sample hold circuit (S/H), 5...Output end.
Claims (1)
子を用いて受光し、この受光した光パワーに比例
した電圧出力を外部出力として得る構成から成る
光／電圧変換回路において、前記光−電流変換素
子からの電流が導かれて該電流を積分する積分回
路と、該積分回路の出力がその入力端子に導かれ
てホールド端子に入力するパルス幅変調に同期し
たホールド信号によりサンプルホールドするサン
プルホールド回路と、該サンプルホールド回路か
らのサンプルホールドされた出力電圧を前記積分
回路に前記光−電流変換素子からの電流に加算す
るように電流帰還する帰還抵抗と、で構成して前
記外部出力として得る電圧出力を前記サンプルホ
ールド回路から取出すようにしたことを特徴とす
る光／電圧変換回路。 In a light/voltage conversion circuit configured to receive pulse width modulated optical power using a light-current conversion element and obtain a voltage output proportional to the received optical power as an external output, the light-current conversion element an integrating circuit to which a current is guided and integrates the current; and a sample hold circuit which samples and holds the output of the integrating circuit by a hold signal synchronized with pulse width modulation which is guided to its input terminal and input to the hold terminal. , a feedback resistor that feeds back a sampled and held output voltage from the sample-and-hold circuit to the integrating circuit so as to add the current from the photo-current conversion element; and a voltage output obtained as the external output. A light/voltage conversion circuit characterized in that: is taken out from the sample and hold circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989111957U JPH0351526U (en) | 1989-09-25 | 1989-09-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989111957U JPH0351526U (en) | 1989-09-25 | 1989-09-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0351526U true JPH0351526U (en) | 1991-05-20 |
Family
ID=31660417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989111957U Pending JPH0351526U (en) | 1989-09-25 | 1989-09-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0351526U (en) |
-
1989
- 1989-09-25 JP JP1989111957U patent/JPH0351526U/ja active Pending
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