JPS62285537A - Optical reception circuit - Google Patents
Optical reception circuitInfo
- Publication number
- JPS62285537A JPS62285537A JP61128579A JP12857986A JPS62285537A JP S62285537 A JPS62285537 A JP S62285537A JP 61128579 A JP61128579 A JP 61128579A JP 12857986 A JP12857986 A JP 12857986A JP S62285537 A JPS62285537 A JP S62285537A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- output
- detection section
- comparator
- head amplifier
- 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 title claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims abstract description 4
- 230000010354 integration Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 230000004044 response Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000005513 bias potential Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/695—Arrangements for optimizing the decision element in the receiver, e.g. by using automatic threshold control
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Manipulation Of Pulses (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
〔産業上の利用分野〕
本発明は光データリンクなどに用いられるディジタル信
号を扱う光受信回路に関し、とくに受光素子と信号処理
部を一体に集積し、ダイナミックレンジが大きく、高速
応答が可能で、ノイズに強い所謂１チツプｉｃ化した光
受信ＩＣに関するものである。[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an optical receiving circuit that handles digital signals used in optical data links, etc., and particularly relates to an optical receiving circuit that handles digital signals used in optical data links, etc. The present invention relates to a so-called one-chip optical receiver IC that is integrated, has a large dynamic range, is capable of high-speed response, and is resistant to noise.
光データリンクなどに用いられるディジタル信号を扱う
光受信回路の基本構成は、第４図に示すように、受光素
子４１から得られる光電流を電圧に変換し増幅する増幅
回路４２と、２値のディジタル信号に復元するコンパレ
ータ４３から構成される。As shown in FIG. 4, the basic configuration of an optical receiving circuit that handles digital signals used in optical data links, etc. includes an amplifier circuit 42 that converts the photocurrent obtained from the light receiving element 41 into voltage and amplifies it, and a binary It is composed of a comparator 43 that restores the digital signal.
４４は出力信号端子を示す。44 indicates an output signal terminal.
増幅回路４２の出力は、通常第５図に示すように受光レ
ベルの大・小により、たとえば１． ｎ、 ｍで示す
受光レベル大・中・小により出力信号波形のなまりの方
が異なるため、一定レベルの基準電位■「と比較し２値
化すると、コンパレータ４３からの出力のデユーティ
（ｄｕｔｙ）比が変化し、波形歪が増大するという問題
がある（従来技術１）。The output of the amplification circuit 42 usually varies depending on the level of the received light as shown in FIG. 5, for example, 1. Since the roundness of the output signal waveform differs depending on the light reception level indicated by n or m (large, medium, or small), when compared with a constant level reference potential ■ and converted into a binary value, the duty of the output from the comparator 43 is
There is a problem that the (duty) ratio changes and waveform distortion increases (Prior Art 1).
この問題を解決するため、増幅回路４２の出力の変化点
を検出する微分回路を付加し、さらに平均値を検出する
平滑回路を付加した後、ヒステリシス機能を有するヒス
テリシス付コンパレータで２値化する手段を含む光受信
回路を本願発明者は既に発明したく特開昭５９−９６０
８９号公報）（従来技術２）。In order to solve this problem, a differentiating circuit is added to detect the changing point of the output of the amplifier circuit 42, and a smoothing circuit is further added to detect the average value, and then a means for binarizing with a hysteresis comparator having a hysteresis function is added. The inventor of the present application has already wished to invent an optical receiving circuit including
No. 89) (Prior Art 2).
従来技術２においては、波形歪の増大に対しては解決す
ることができたが、なお次のような問題が残っている。In prior art 2, although the increase in waveform distortion could be solved, the following problems still remain.
■ 微分方式を用いているため微小変化に追随する。す
なわちノイズに弱い。■ It follows minute changes because it uses a differential method. In other words, it is susceptible to noise.
■ コンパレータの基準電位を発生する平均値検出部に
外付けのコンデンサ（０，１μＦ程度）を用いているた
め完全な１チツプ化が達成できない。■ Since an external capacitor (approximately 0.1 μF) is used in the average value detection section that generates the reference potential of the comparator, complete integration into one chip cannot be achieved.
■ 使用するヒステリシス付きコンパレータは、ヒステ
リシス幅を決定する二つの定電流（ＰＮＰトラジスタ構
成の電流はき出しと、ＮＰＮ トラジスタ構成の電流吸
い込み）の基準電流電源が個別に設定されているため、
温度変動や電圧変動に対して精度が出しにくい。■ The comparator with hysteresis used has separate reference current power supplies for the two constant currents (current source for the PNP transistor configuration and current sink for the NPN transistor configuration) that determine the hysteresis width.
It is difficult to achieve accuracy with respect to temperature and voltage fluctuations.
■ 初段の電流−電圧変換部を構成するヘッドアンプに
リンギングが発生し、これを防止するため帰還抵抗と並
列に１０ｐＦ程度のコンデンサが必要となり応答性が悪
くなる。(2) Ringing occurs in the head amplifier constituting the first-stage current-voltage converter, and to prevent this, a capacitor of about 10 pF is required in parallel with the feedback resistor, resulting in poor response.
本発明は従来技術２において、なお残された問題点を解
決するため、２値のディジタル信号を扱う光受信回路に
おいて、受光素子から得られる光電流を電圧に変換し増
幅するヘッドアンプと、ヘッドアンプと対称構造を有す
るダミーアンプと、ヘッドアンプの出力のピーク値を検
出し保持するピーク検出部と、ダミーアンプの出力とピ
ーク検出部の出力からヘッドアンプの出力の中央値を作
成する平均値検出部と、ヘッドアンプの出力と平均値検
出部の出力を差動増幅する差動アンプと、差動アンプの
出力のバイアス同一電位を与える基準電位発生部と、差
動アンプ出力と基準電位発生部の出力を比較し、その大
・小を識別しディジタル信号に復元するコンパレータと
を備えた構成を特徴とする。In order to solve the problems still remaining in Prior Art 2, the present invention provides a head amplifier that converts and amplifies the photocurrent obtained from a light receiving element into voltage, and a head A dummy amplifier having a symmetrical structure with the amplifier, a peak detection section that detects and holds the peak value of the output of the head amplifier, and an average value that creates a median value of the output of the head amplifier from the output of the dummy amplifier and the output of the peak detection section. A detection section, a differential amplifier that differentially amplifies the output of the head amplifier and the output of the average value detection section, a reference potential generation section that provides the same bias potential for the output of the differential amplifier, and a differential amplifier output and reference potential generation. It is characterized by a configuration that includes a comparator that compares the outputs of the parts, distinguishes whether the output is large or small, and restores it to a digital signal.
本発明は初段のヘッドアンプと対称な構成を有するダミ
ーアンプを設け、ピーク検出部によりヘッドのピーク値
を検出し、ダミーアンプとピーク検出部からヘッドアン
プ振幅の中間値を作り、この中間値とヘッドアンプの出
力とを差動アンプで受ける、所謂光ＡＴＣ回路を構成し
、コンパレータによりＡＴＣ回路の出力と基準電位を２
値化する。なおＡＴＣ回路および基準電位はバイアスの
ばらつきがある程度見込めるので、コンパレータにはヒ
ステリシスを付加する。以上の構成により、従来技術２
において残された問題点が解決された。The present invention provides a dummy amplifier having a configuration symmetrical to the first-stage head amplifier, detects the peak value of the head by a peak detection section, creates an intermediate value of the head amplifier amplitude from the dummy amplifier and the peak detection section, and A so-called optical ATC circuit is constructed in which the output of the head amplifier is received by a differential amplifier, and the output of the ATC circuit and the reference potential are divided into two by a comparator.
Value. Note that since a certain degree of bias variation can be expected in the ATC circuit and the reference potential, hysteresis is added to the comparator. With the above configuration, conventional technology 2
The remaining problems have been resolved.
次に図面にもとづき実例について説明する。Next, an example will be explained based on the drawings.
第１図に本発明の一実施例のブロック構成図を示す、１
はヘッドアンプ、２はダミーアンプ、３はピーク検出部
、４は平均値検出部、５は差動アンプ、６は基準電位発
生部、７はヒステリシス付コンパレータ、８は受光素子
、９は出力信号端子で、ヘッドアンプ１、ダミーアンプ
２、ピーク検出部３、平均値検出部４、差動アンプ５、
基準電位発生部６、受光素子８で光ＡＴＣ回路を構成す
る。ＡＴＣ回路ではヘッドアンプ１の出力とその振幅の
平均値（中央値）とを差動アンプ５で増幅するため、波
形歪が小さく、かつノイズマージンの大きい波形を出力
することができる。差動アンプ・５の出力のバイアスを
与える部分を全く対称に別途基準電位発生部６により構
成し、基準電位発生部６により作られる電位を基準電位
としてヒステリシス付コンパレータ７へ入力する。FIG. 1 shows a block diagram of an embodiment of the present invention.
is a head amplifier, 2 is a dummy amplifier, 3 is a peak detection section, 4 is an average value detection section, 5 is a differential amplifier, 6 is a reference potential generation section, 7 is a comparator with hysteresis, 8 is a light receiving element, and 9 is an output signal At the terminals, head amplifier 1, dummy amplifier 2, peak detector 3, average value detector 4, differential amplifier 5,
The reference potential generator 6 and the light receiving element 8 constitute an optical ATC circuit. In the ATC circuit, since the output of the head amplifier 1 and the average value (median value) of its amplitude are amplified by the differential amplifier 5, a waveform with small waveform distortion and a large noise margin can be output. A portion that applies a bias to the output of the differential amplifier 5 is completely symmetrically constituted by a separate reference potential generation section 6, and the potential generated by the reference potential generation section 6 is inputted to a comparator 7 with hysteresis as a reference potential.
ヒステリシス付コンパレータば、ヒステリシス幅の制度
を向上させるため、基準電流源を統一するか、または大
振幅の出力段からの回り込みを防ぐため、出力段とそれ
以外で用いる定電流源の基準電流源は切り分けるなどの
改良を施している。In the case of a comparator with hysteresis, in order to improve the accuracy of the hysteresis width, the reference current source must be unified, or in order to prevent large amplitude feedback from the output stage, the reference current source of the constant current source used in the output stage and other parts may be Improvements have been made, such as cutting it apart.
第２図は本発明の一実施例の回路構成図で、第３図は本
発明のヒステリシス付コンパレータの実施例の回路構成
図である。第２図において定電流源回路は省略記号で示
しである。FIG. 2 is a circuit diagram of an embodiment of the present invention, and FIG. 3 is a circuit diagram of an embodiment of a comparator with hysteresis of the present invention. In FIG. 2, the constant current source circuit is indicated by an omitted symbol.
本発明の第２図の実施例の回路について特徴・動作など
について以下説明する。本回路の特徴は次のとおりであ
る。The features and operation of the circuit according to the embodiment of the present invention shown in FIG. 2 will be described below. The features of this circuit are as follows.
■ 受光素子と信号処理部を一体に集積（１チツプ化）
した光受信ＩＣ用の回路を提供すること。■ Integration of photodetector and signal processing unit (one chip)
To provide a circuit for an optical receiving IC.
■ 上記ＩＣの性能として
１ ダイナミックレンジが大きい、
ｉｉ 高速伝送（Ｉ Ｍｂｉｔ ／ ｓｅｃ以上）が
可能、ｉｉ 波形歪みが小さい、
ｉｖ ノイズに強い。■ Performance of the above IC is as follows: 1. Large dynamic range, ii. High-speed transmission (more than 1 Mbit/sec) possible, ii. Low waveform distortion, iv. Strong against noise.
本実施例に基づく動作及び機能は次のとおりである。The operations and functions based on this embodiment are as follows.
■ ダイナミックレンジが大きい
ヘッドアンプにリミッタ−（Ｑ、に相当する）を付加し
ているごとによる。ヘッドアンプの出力振幅は、ＰＤか
ら得られる電流（■。）と帰ｉ＝抵抗Ｒ４との積で与え
られるが、Ｑ４ （ダイ１ オード）がある
ため、■□（中０．７ ■）以下に押えられる。ダイナ
ミックレンジが大きいので、種々の光量変化（伝送距離
の違いによる光量変化、ＬＥＤの温度特性経年変化等）
に無調整、すなわち外付は部品不要で対応できる。■ This is due to the fact that a limiter (equivalent to Q) is added to the head amplifier, which has a large dynamic range. The output amplitude of the head amplifier is given by the product of the current (■.) obtained from the PD and the return i = resistance R4, but because of Q4 (diode 1), it is less than ■□ (medium 0.7 ■). be held down by Since the dynamic range is large, various changes in light intensity (changes in light intensity due to differences in transmission distance, changes in LED temperature characteristics over time, etc.)
No adjustment required, that is, no external parts are required.
■ 高速伝送が可能
伝送速度はＩ Ｍｂｉｔ ／ ｓｅｃ以上程度、得られ
る。ＰＤ一体型光受信ＩＣでは以下に述べる理由により
１００ Ｋｂｉｔ ／ ｓｅｃオーダが主流でＭ ｂ
ｉ【へｅｓオーダを達成した例は未だない。■ High-speed transmission is possible Transmission speeds of IMbit/sec or higher can be obtained. For PD-integrated optical receiver ICs, 100 Kbit/sec order is mainstream for the reasons described below.
There is no example yet of achieving the i[es order.
ＰＤと信号処理部を一体に準備し１チツプ化する場合Ｓ
ｉバイポーラ（Ｓｉ −ｂｉｐｏｌａｒ ）プロセスで
同時に作り込む方法が主流で、この際ＰＤの接合容量は
面積に比例し、ＩＩＩＩｌｌｔで５０〜１００ｐＦ （
逆バイアス＝ｏ■として）程度の大きさとなり、応答性
を著しく悪くする要因となっていた。本発明では、この
点を改良する方法として、
ｉ ＰＤの接合容量は逆バイアスを大きくがけると減
少する。When preparing the PD and signal processing section as one chip S
The mainstream method is to simultaneously fabricate the PD using the i-bipolar (Si-bipolar) process. In this case, the junction capacitance of the PD is proportional to the area, and is 50 to 100 pF (
Assuming reverse bias=o■), this was a factor that significantly worsened the responsiveness. In the present invention, as a method to improve this point, the junction capacitance of i PD is reduced by applying a large reverse bias.
１ｉＰＤアノード、カソード間電位に入力依存性をもた
せず一定に保持すれば、応答性は改善される。If the potential between the 1iPD anode and cathode is held constant without input dependence, the response will be improved.
以上の２点に着目して、ヘッドアンプを設計した。つま
り、Ｑ３のベース電位を常に２■、６（１，４Ｖ）に固
定し、ＰＤの逆バイアスとして３゜６■程度を常に印加
している。We designed the head amplifier with the above two points in mind. That is, the base potential of Q3 is always fixed at 2.6.6 (1.4 V), and about 3.6.degree. is always applied as a reverse bias to the PD.
しかし、上記手段だけでは限界がある。Ｒ４はゲインを
与え、できる限り大きい方が望ましいが、（ダイオード
（Ｑ４）の接合容量（ｌｐ Ｆ）との関係からも）大き
すぎると応答性を悪くする。立上り、立下りがどうして
もなまってしまう。そこで本発明では後述するＡＴＣ機
能を付加して、アンプ光が波形の平均値（中間値）でス
ライスし、応答性、波形歪等の改善を行なっている。However, the above means alone have limitations. R4 provides a gain and is preferably as large as possible; however, if it is too large (also from the relationship with the junction capacitance (lpF) of the diode (Q4)), the response will deteriorate. The rise and fall are inevitably sluggish. Therefore, in the present invention, an ATC function, which will be described later, is added to slice the amplifier light at the average value (intermediate value) of the waveform, thereby improving responsiveness, waveform distortion, etc.
■ 波形歪が小さい
ＡＴＣ機能を付加したため、出力波形のパルス歪は小さ
い。■ Low waveform distortion Since the ATC function is added, the pulse distortion of the output waveform is small.
■ ノイズに強い
ＡＴＣ方式は波形歪を小さくできる利点があるが、ＤＣ
レベルの判別が難しく、誤動作を起こしやすい。本発明
では、ヘッドアンプと対称回路のダミーアンプとバイア
ス差を予め与えておきＤＣレベルの判別も容易にしてい
る。しかし、この差はあまり大きくとれず（受信感度が
悪くなるため）１０ｍＶ程度である。■ The noise-resistant ATC method has the advantage of reducing waveform distortion, but
Difficult to determine the level and prone to malfunction. In the present invention, a bias difference between the head amplifier and the dummy amplifier of the symmetrical circuit is given in advance to facilitate discrimination of the DC level. However, this difference cannot be made very large (because the receiving sensitivity deteriorates), and is about 10 mV.
ここでバイアス差をつけたとしても、後段（平均値検出
部、差導アンプ等）の■□のばらつき等を考慮すると最
終的に２値化するコンパレータ入力段ではかなりのバイ
アスのばらつきを考慮しておく必要がある。従って、前
の情報を保持し、それ以上の変化がないと反転しないヒ
ステリシス機能をコンパレータに付加する。このヒステ
リシス幅はＲ１と、定電流源（Ｑ、。Even if a bias difference is made here, considering the variations in ■□ in the subsequent stages (average value detection section, differential amplifier, etc.), there will be considerable bias variations in the comparator input stage that will ultimately be converted into binary data. It is necessary to keep it. Therefore, a hysteresis function is added to the comparator that retains the previous information and does not reverse unless there is a further change. This hysteresis width is R1 and a constant current source (Q,).
のコレクター電流）の積で与えられ３０ｍＶ程度として
いる。collector current), and is approximately 30 mV.
以上説明したように、本発明の光受信回路によると、受
光素子を含め、信号処理部まで完全に１チツプＩＣ化が
可能であるとともに、次の利点がある。As explained above, according to the optical receiving circuit of the present invention, it is possible to completely integrate the signal processing section including the light receiving element into a single chip IC, and it has the following advantages.
■ へラドアップの改良とＡＴＣ方式を用いていること
から、高速伝送が可能であり、かつ波形歪の小さい出力
が得られる。- By using an improved Radup and ATC method, high-speed transmission is possible and an output with low waveform distortion can be obtained.
■ ピーク検出部はホールドするまでの時間が比較的短
か（、一旦ホールドすると復帰するまでの時間が長いの
で、ホールド時間の長い良好なＡＴＣ機能が達成できる
。(2) Does the peak detection section take a relatively short time to hold (once it is held, it takes a long time to recover, so a good ATC function with a long hold time can be achieved).
■ 従来の微分方式に替え、波形の中央値で識別するＡ
ＴＣ回路を用いるため、ノイズにも強い。■ Instead of the conventional differential method, A that identifies based on the median value of the waveform.
Since it uses a TC circuit, it is also resistant to noise.
■ ヘッドアンプにリミッタ回路を付加することにより
、ダイナミックレンジが大きい。■ By adding a limiter circuit to the head amplifier, the dynamic range is large.
以上のように、本発明は、光通信の普及がますます進み
、今度、高速化、小型化、低価格化、さらに、たとえば
高速伝送が可能、ダイナミックレンジが大、ノイズに強
いなどの高性能の光受信のモノリシックＩＣの要求に対
し適用してその効果が顕著である。As described above, the present invention has been developed as optical communication is becoming more and more popular, and it is now possible to achieve faster speeds, smaller sizes, lower prices, and even higher performance such as high-speed transmission, large dynamic range, and resistance to noise. The effect is remarkable when applied to the requirements of monolithic ICs for optical reception.
第１図は本発明の一実施例のブロック構成図、第２図は
本発明の一実施例の回路図、第３図は本発明のヒステリ
シス付コンパレータの実施例の回路図、第４図は光受信
回路の基本構成図、第５図は増幅回路の出力波形である
。
１・・・ヘッドアンプ、２・・・ダミーアンプ、３・・
・ピーク検出部、４・・・平均値検出部、５・・・差動
アンプ、６・・・基準電位発生部、７・・・ヒステリシ
ス付コンパレータ、８・・・受光素子、９・・・出力信
号端子、４１・・・受光素子、４２・・・増幅回路、４
３・・・コンパレータ、４４・・・出力信号端子
本発明の一実８％！例のプロ・ツク構成図第１図
光受信回路の基本構成図
′Ｍ ４ 図
１惺回路の出力波形
第５図FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram of an embodiment of the present invention, FIG. 3 is a circuit diagram of an embodiment of a comparator with hysteresis of the present invention, and FIG. 4 is a circuit diagram of an embodiment of the present invention. FIG. 5, which is a basic configuration diagram of the optical receiving circuit, shows the output waveform of the amplifier circuit. 1...Head amplifier, 2...Dummy amplifier, 3...
- Peak detection section, 4... Average value detection section, 5... Differential amplifier, 6... Reference potential generation section, 7... Comparator with hysteresis, 8... Light receiving element, 9... Output signal terminal, 41... Light receiving element, 42... Amplifying circuit, 4
3... Comparator, 44... Output signal terminal 8% of the present invention! Example program block diagram Figure 1 Basic configuration diagram of optical receiver circuit 'M4 Figure 1 Output waveform of optical circuit Figure 5
Claims (4)
、 受光素子から得られる光電流を電圧に変換し増幅するヘ
ッドアンプと、 前記ヘッドアンプと対称構造を有するダミーアンプと、 前記ヘッドアンプの出力のピーク値を検出し保持するピ
ーク検出部と、 前記ダミーアンプの出力と前記ピーク検出部の出力から
前記ヘッドアンプの出力の中央値を作成する平均値検出
部と、 前記ヘッドアンプの出力と前記平均値検出部の出力を差
動増幅する差動アンプと、 前記差動アンプの出力のバイアスと同一電位を与える基
準電位発生部と、 前記差動アンプの出力と前記基準電位発生部の出力とを
比較し、その大・小を識別しディジタル信号に復元する
コンパレータとを備えてなる ことを特徴とする光受信回路。(1) An optical receiving circuit that handles binary digital signals includes: a head amplifier that converts a photocurrent obtained from a light receiving element into voltage and amplifies it; a dummy amplifier having a symmetrical structure with the head amplifier; and an output of the head amplifier. a peak detection section that detects and holds the peak value of the head amplifier; an average value detection section that creates a median value of the output of the head amplifier from the output of the dummy amplifier and the output of the peak detection section; a differential amplifier that differentially amplifies the output of the average value detection section; a reference potential generation section that provides the same potential as the bias of the output of the differential amplifier; and an output of the differential amplifier and an output of the reference potential generation section. 1. An optical receiving circuit comprising: a comparator that compares the signals, distinguishes whether the signals are large or small, and restores it to a digital signal.
に差をつけてなることを特徴とする特許請求の範囲第１
項記載の光受信回路。(2) Claim 1, characterized in that the head amplifier and the dummy amplifier have different biases.
Optical receiver circuit described in section.
接地し、 エミッタをコンデンサと定電流回路の並列体を介して電
源に接続したＰＮＰトラジスタにより構成してなる ことを特徴とする特許請求の範囲第１項記載の光受信回
路。(3) The peak detection section is constituted by a PNP transistor whose base is connected to the output of the head amplifier, whose collector is grounded, and whose emitter is connected to a power supply via a parallel body of a capacitor and a constant current circuit. An optical receiving circuit according to claim 1, characterized in that:
なにことを特徴とする特許請求の範囲第１項記載の光受
信回路。(4) The optical receiving circuit according to claim 1, wherein the comparator has a hysteresis function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61128579A JPS62285537A (en) | 1986-06-03 | 1986-06-03 | Optical reception circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61128579A JPS62285537A (en) | 1986-06-03 | 1986-06-03 | Optical reception circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62285537A true JPS62285537A (en) | 1987-12-11 |
Family
ID=14988239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61128579A Pending JPS62285537A (en) | 1986-06-03 | 1986-06-03 | Optical reception circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62285537A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0715387A (en) * | 1993-06-15 | 1995-01-17 | Nec Corp | Optical receiver |
| US6084232A (en) * | 1997-11-13 | 2000-07-04 | Matsushita Electric Industrial Co., Ltd. | Optical receiver pre-amplifier which prevents ringing by shunting an input current of the pre-amplifier |
| WO2007007747A1 (en) * | 2005-07-12 | 2007-01-18 | Hamamatsu Photonics K.K. | Photodetection circuit |
| JP2015076652A (en) * | 2013-10-07 | 2015-04-20 | ソニー株式会社 | Optical reception circuit, optical reception device and optical transmission system |
| JP2016205973A (en) * | 2015-04-21 | 2016-12-08 | シャープ株式会社 | Light pulse detection circuit and electronic apparatus |
| US9847842B2 (en) | 2014-03-03 | 2017-12-19 | Panasonic Intellectual Property Management Co., Ltd. | Optical reception circuit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59257A (en) * | 1982-06-25 | 1984-01-05 | Pioneer Electronic Corp | Digital modulating signal reader |
-
1986
- 1986-06-03 JP JP61128579A patent/JPS62285537A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59257A (en) * | 1982-06-25 | 1984-01-05 | Pioneer Electronic Corp | Digital modulating signal reader |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0715387A (en) * | 1993-06-15 | 1995-01-17 | Nec Corp | Optical receiver |
| US6084232A (en) * | 1997-11-13 | 2000-07-04 | Matsushita Electric Industrial Co., Ltd. | Optical receiver pre-amplifier which prevents ringing by shunting an input current of the pre-amplifier |
| WO2007007747A1 (en) * | 2005-07-12 | 2007-01-18 | Hamamatsu Photonics K.K. | Photodetection circuit |
| JP2007027209A (en) * | 2005-07-12 | 2007-02-01 | Hamamatsu Photonics Kk | Light detection circuit |
| US8143564B2 (en) | 2005-07-12 | 2012-03-27 | Hamamatsu Photonics K.K. | Photodetection circuit |
| JP2015076652A (en) * | 2013-10-07 | 2015-04-20 | ソニー株式会社 | Optical reception circuit, optical reception device and optical transmission system |
| US9847842B2 (en) | 2014-03-03 | 2017-12-19 | Panasonic Intellectual Property Management Co., Ltd. | Optical reception circuit |
| JP2016205973A (en) * | 2015-04-21 | 2016-12-08 | シャープ株式会社 | Light pulse detection circuit and electronic apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH09130157A (en) | Pre-amplifier | |
| JPH10200342A (en) | Bias voltage supply circuit | |
| JPS634727A (en) | Optical digital signal receiver | |
| JPS62285537A (en) | Optical reception circuit | |
| JP2003168933A (en) | Photoreceiving circuit | |
| JP2000269541A (en) | Light signal receiving device | |
| JPH08288757A (en) | Digital receiving circuit | |
| JPS623625B2 (en) | ||
| JPH087693Y2 (en) | APD bias voltage control circuit | |
| JP3006319B2 (en) | Light receiving circuit | |
| JP2575649B2 (en) | Amplifier circuit of optical receiving circuit | |
| JPH02215251A (en) | Optical reception circuit | |
| JP3632323B2 (en) | Identification circuit | |
| JPS62281480A (en) | Optical reception circuit | |
| JPS6313534A (en) | Bias voltage control circuit | |
| JPH0316048B2 (en) | ||
| US4698528A (en) | Edge detection using dual trans-impedance amplifier | |
| JPH079450Y2 (en) | Optical receiver circuit | |
| JPH0360516A (en) | Photodetecting circuit for photoelectric switch | |
| JPH01305326A (en) | Circuit for photodetector | |
| JPH06216946A (en) | Nonlinear burst-mode-data receiver | |
| JPS6085649A (en) | Optical reception circuit | |
| JPS63104384A (en) | Photoelectric conversion circuit | |
| JPH01101012A (en) | Light receiving circuit | |
| JPH07101891B2 (en) | Optical receiver circuit |