JPS62196415U - - Google Patents
Info
- Publication number
- JPS62196415U JPS62196415U JP1986084884U JP8488486U JPS62196415U JP S62196415 U JPS62196415 U JP S62196415U JP 1986084884 U JP1986084884 U JP 1986084884U JP 8488486 U JP8488486 U JP 8488486U JP S62196415 U JPS62196415 U JP S62196415U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- preamplifier
- signal
- photodiode
- 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 description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Optical Communication System (AREA)
Description
第１図は、この考案の一実施例による光受信装
置を示すブロツク図、第２図は、切換回路の一例
を示す接続図、第３図は従来の光受信装置を示す
ブロツク図である。
２はフオトダイオード、３は前置増幅回路、４
は第１の帰還抵抗、５は可変利得増幅回路、６は
ピーク値検出回路、７は識別回路、９は第２の帰
還抵抗、１０は切換回路。なお、図中同一符号は
同一、又は相当部分を示す。
FIG. 1 is a block diagram showing an optical receiver according to an embodiment of the invention, FIG. 2 is a connection diagram showing an example of a switching circuit, and FIG. 3 is a block diagram showing a conventional optical receiver. 2 is a photodiode, 3 is a preamplifier circuit, 4
1 is a first feedback resistor, 5 is a variable gain amplifier circuit, 6 is a peak value detection circuit, 7 is an identification circuit, 9 is a second feedback resistor, and 10 is a switching circuit. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
ードと、このフオトダイオードの電流変化による
信号を電圧変化による信号に変換する前置増幅回
路と、この前置増幅回路の入出力間を接続する第
１の帰還抵抗と、前記前置増幅回路の出力を受け
て増幅利得が変化する可変利得増幅回路と、この
可変利得増幅回路の出力を検出して利得を制御す
る電圧を作り出すピーク値検出回路と、前記可変
増幅回路の出力信号の波形成形を行う識別回路で
構成された光受信装置において、前記前置増幅回
路に切換回路を介して第２の帰還抵抗を接続し、
前記ピーク値検出回路の出力を前記切換回路に供
給したことを特徴とする光受信装置。 A photodiode that converts an input optical signal into an electrical signal, a preamplifier circuit that converts a signal due to a current change of the photodiode into a signal due to a voltage change, and a first preamplifier circuit that connects the input and output of this preamplifier circuit. a feedback resistor, a variable gain amplifier circuit whose amplification gain changes in response to the output of the preamplifier circuit, a peak value detection circuit that detects the output of the variable gain amplifier circuit and generates a voltage for controlling the gain; In an optical receiver configured with an identification circuit that shapes the waveform of an output signal of a variable amplifier circuit, a second feedback resistor is connected to the preamplifier circuit via a switching circuit,
An optical receiving device characterized in that the output of the peak value detection circuit is supplied to the switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986084884U JPS62196415U (en) | 1986-06-04 | 1986-06-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986084884U JPS62196415U (en) | 1986-06-04 | 1986-06-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62196415U true JPS62196415U (en) | 1987-12-14 |
Family
ID=30939782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986084884U Pending JPS62196415U (en) | 1986-06-04 | 1986-06-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62196415U (en) |
-
1986
- 1986-06-04 JP JP1986084884U patent/JPS62196415U/ja active Pending