JPS58121420U - Reception level automatic adjustment circuit - Google Patents
Reception level automatic adjustment circuitInfo
- Publication number
- JPS58121420U JPS58121420U JP1982018107U JP1810782U JPS58121420U JP S58121420 U JPS58121420 U JP S58121420U JP 1982018107 U JP1982018107 U JP 1982018107U JP 1810782 U JP1810782 U JP 1810782U JP S58121420 U JPS58121420 U JP S58121420U
- Authority
- JP
- Japan
- Prior art keywords
- adjustment circuit
- conversion element
- reception level
- amplifier
- light receiving
- 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
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Optical Communication System (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は発光素子の出力発光電流の関係を表わす図、第
２図はこの考案の一実施例を示す受信し。
ベル自動調整回路のブロック図、第３図はこの考案の他
の実施例を示す可変抵抗器の図である。
図中、３はホトダイオード、４はＤＣ増幅器、５は抵抗
器、−６はＡＧＣ増幅器、７はローパスフィルタ、８は
光電変換素子を示す。FIG. 1 is a diagram showing the relationship between the output light emitting current of a light emitting element, and FIG. 2 is a diagram showing an embodiment of this invention. A block diagram of the automatic bell adjustment circuit, and FIG. 3 is a diagram of a variable resistor showing another embodiment of this invention. In the figure, 3 is a photodiode, 4 is a DC amplifier, 5 is a resistor, -6 is an AGC amplifier, 7 is a low-pass filter, and 8 is a photoelectric conversion element.
Claims (1)
ＤＣ増幅器及びＡＧＣ増幅器で構成されている光信号受
信装置において、前記ＤＣ増幅器の出力端子に接続され
た光電変換素子又は熱電変換素子により、前記受光素子
の光入力信号が増大したとき、前記光電変換素子又は熱
電変換素子の抵抗値を変化し、前記ＡＧＣ増幅器の入力
レベルを減衰させることを特徴とする受信レベル自動調
整回路。In an optical signal receiving device comprising a light receiving element, a DC amplifier and an AGC amplifier that amplify the output electric signal of the light receiving element, a photoelectric conversion element or a thermoelectric conversion element connected to the output terminal of the DC amplifier . An automatic reception level adjustment circuit characterized in that when an optical input signal to the light receiving element increases, the resistance value of the photoelectric conversion element or the thermoelectric conversion element is changed to attenuate the input level of the AGC amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982018107U JPS58121420U (en) | 1982-02-13 | 1982-02-13 | Reception level automatic adjustment circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982018107U JPS58121420U (en) | 1982-02-13 | 1982-02-13 | Reception level automatic adjustment circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58121420U true JPS58121420U (en) | 1983-08-18 |
Family
ID=30030374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1982018107U Pending JPS58121420U (en) | 1982-02-13 | 1982-02-13 | Reception level automatic adjustment circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58121420U (en) |
-
1982
- 1982-02-13 JP JP1982018107U patent/JPS58121420U/en active Pending
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