JPH0264255U

JPH0264255U -

Info

Publication number: JPH0264255U
Application number: JP14352188U
Authority: JP
Priority date: 1988-11-02
Filing date: 1988-11-02
Publication date: 1990-05-15

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例を示す構成図、第
２図は第１図における各部の波形を示した図、第
３図は従来の光受信器の構成図、第４図は第３図
における各部の波形を示した図であり、１はＤＣ
／ＤＣコンバータ、２はＡＰＤ、３は抵抗、４は
プリアンプ、５はメインアンプ、６はＤ−フリツ
プフロツプ、７はクロツク再生回路、８は光断検
出回路、９はＡＮＤゲート、１０はデータ信号出
力端子、１１はアラーム信号出力端子、１２は低
周波信号発生器である。なお、各図中の同一符号
は同一または相当部分を示す。 Fig. 1 is a block diagram showing an embodiment of this invention, Fig. 2 is a diagram showing waveforms of each part in Fig. 1, Fig. 3 is a block diagram of a conventional optical receiver, and Fig. 4 is a block diagram of a conventional optical receiver. 1 is a diagram showing the waveforms of each part in the figure, and 1 is a DC
/DC converter, 2 is an APD, 3 is a resistor, 4 is a preamplifier, 5 is a main amplifier, 6 is a D-flip-flop, 7 is a clock regeneration circuit, 8 is a light disconnection detection circuit, 9 is an AND gate, 10 is a data signal output Terminal 11 is an alarm signal output terminal, and 12 is a low frequency signal generator. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

An optical receiver that converts an optical signal into an electrical signal includes an AC signal source that generates a frequency lower than the transmission speed of the optical input signal, and an AC signal output from the AC signal source to convert the AC signal into a boosted DC voltage. A DC/DC converter that outputs in a stacked manner, an avalanche photodiode that receives an optical signal and further receives a reverse voltage containing an alternating current signal from the DC/DC converter and outputs an AM-modulated electric signal, and this avalanche photodiode. A load resistor connected to one end, a preamplifier that receives and amplifies the AM modulated signal of the avalanche photodiode, a main amplifier that receives and further amplifies the AM modulated signal amplified by the preamplifier, and a main amplifier that receives and amplifies the AM modulated signal of the avalanche photodiode. a clock regeneration circuit that receives an AM modulated signal amplified by the clock signal and reproduces an even-numbered clock signal; and an output signal that receives the clock signal and the AM modulated output signal of the main amplifier and is synchronized with the clock signal. a D-flip-flop that outputs an AM modulated output signal of the main amplifier and outputs it as a DC voltage signal;
An optical receiver having an AND circuit that receives an output signal of a FLOP and outputs it as an AND sum.