WO2007036993A1 - 光受信器およびその識別閾値生成方法 - Google Patents
光受信器およびその識別閾値生成方法 Download PDFInfo
- Publication number
- WO2007036993A1 WO2007036993A1 PCT/JP2005/017812 JP2005017812W WO2007036993A1 WO 2007036993 A1 WO2007036993 A1 WO 2007036993A1 JP 2005017812 W JP2005017812 W JP 2005017812W WO 2007036993 A1 WO2007036993 A1 WO 2007036993A1
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- WO
- WIPO (PCT)
- Prior art keywords
- signal
- identification
- output
- circuit
- average value
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 10
- 238000001514 detection method Methods 0.000 claims abstract description 32
- 230000003321 amplification Effects 0.000 claims abstract description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 8
- 230000003287 optical effect Effects 0.000 claims description 70
- 230000001052 transient effect Effects 0.000 abstract description 31
- 238000010586 diagram Methods 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
- H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3084—Automatic control in amplifiers having semiconductor devices in receivers or transmitters for electromagnetic waves other than radiowaves, e.g. lightwaves
-
- 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
- H04B10/693—Arrangements for optimizing the preamplifier in the receiver
- H04B10/6931—Automatic gain control of the preamplifier
-
- 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
Definitions
- the present invention relates to an optical receiver, and more particularly to an optical receiver suitable for a PON (Passive Optical Network) system that transmits burst optical signals and a method for generating an identification threshold value thereof. .
- PON Passive Optical Network
- the optical receiver includes a photoelectric conversion element that converts a received burst digital optical signal into an electric signal, a first positive-phase signal and a first reverse signal of a differential output obtained by amplifying the electric signal to a predetermined level.
- a second positive phase signal that is a binary average of the value of the first positive phase signal and the peak hold value of the first negative phase signal; When the signal is the first negative-phase signal and the signal is the peak hold value of the first positive-phase signal, and when there is no signal, the binary average value of the offset voltage set to a value higher than this value is taken.
- An automatic threshold control (ATC) circuit that outputs a second negative phase signal that is in reverse phase with the second positive phase signal, and a second positive phase signal and a second negative phase signal.
- ATC automatic threshold control
- the preamplifier connected to the photoelectric conversion element has its own gain according to the detection level obtained by high-speed peak detection of the optical output signal level from the photoelectric conversion element.
- the automatic threshold control circuit connected to the output side of the preamplifier performs the signal output of the differential output signal in which the preamplifier force is also output, and the peak detection (PD) and the bottom detection (BD).
- the discrimination output (level) obtained by averaging the selection circuit outputs generated based on the two detection outputs is input to the subsequent discriminator.
- Patent Document 1 Japanese Patent Laid-Open No. 9 181687
- the present invention has been made in view of the above, and prevents the unintended gain switching and generation of an erroneous identification level even if the received light signal has a transient response. It is an object of the present invention to provide an optical receiver capable of generating an identification level equivalent to that obtained when there is no answer and a method for generating the identification threshold.
- an optical receiver includes a preamplifier that converts and amplifies the output of a light receiving element that converts a received light signal into a current signal, and a preamplifier.
- An optical receiver comprising: an identification reproduction unit including an identification circuit that uses the output signal of the amplification unit as an input signal and performs signal identification of the input signal based on a threshold value generated based on the input signal.
- the preamplifier includes a first average value detection circuit that detects an average value of the output signal of the preamplifier, and outputs a comparison output between the output of the first average value detection circuit and a predetermined reference voltage.
- the identification reproduction unit includes a second average value detection circuit that detects an average value of an input signal to the identification circuit, and outputs an output of the second average value detection circuit. It is characterized in that it is output to the identification circuit as a threshold for performing signal identification of the input signal.
- the preamplifier is based on a comparison output between the output of the first average value detection circuit that detects the average value of its output signal and a predetermined reference voltage.
- the identification reproduction unit outputs the output of the second average value detection circuit that detects the average value of the input signal to the identification circuit to the identification circuit as a threshold value for identifying the signal of the input signal.
- FIG. 1 is a block diagram showing a configuration of an optical receiver according to a first embodiment of the present invention.
- Fig. 2-1 does not consider the transient response in the optical receiver to which the conventional technology is applied! It is a figure for demonstrating the operation
- Fig. 2-2 is a diagram for explaining the operation when considering the transient response in the optical receiver to which the conventional technology is applied.
- FIG. 3 is a diagram for explaining the operation of the optical receiver of the first embodiment in consideration of the transient response.
- FIG. 4 is a block diagram showing a configuration of the optical receiver according to the second exemplary embodiment of the present invention.
- FIG. 5 is a diagram for explaining the operation of the optical receiver according to the third embodiment of the present invention.
- FIG. 6 is a diagram for explaining an operation of the optical receiver according to the fourth embodiment of the present invention.
- FIG. 1 is a block diagram showing a configuration of the optical receiver according to the first exemplary embodiment of the present invention.
- the optical receiver shown in the figure includes a light receiving element 1 that receives an optical signal, a preamplifier 2 that receives the output current of the light receiving element 1, converts the input current signal into a voltage signal, and outputs the voltage signal.
- An identification reproduction unit 3 that receives the output voltage of the preamplifier 2 and identifies the voltage level of the input output voltage is provided.
- the buffer unit 26 of the preamplifier unit 2 includes a transimpedance amplifier (hereinafter abbreviated as “TIA”) 5 and an automatic gain control unit (hereinafter abbreviated as “AGC unit”) 6. Configured to provide.
- TIA transimpedance amplifier
- AGC unit automatic gain control unit
- the identification / playback unit 3 generates a predetermined threshold level and outputs it based on an automatic threshold control unit (hereinafter abbreviated as “ATC unit”) 7, an input signal to itself, and an output of the ATC unit 7. And an identification circuit 18 for identifying an input signal (level).
- ATC unit automatic threshold control unit
- the TIA 5 includes an inverting amplifier 12 and a feedback resistor (Rf) 13, and the AGC unit 6 detects an average value of the output level of the preamplifier unit 2.
- Comparison circuit 16 that compares output level of average value detection circuit 14 with reference voltage (Vref) 15; feedback resistor (Rf) drive circuit 17 that variably controls the resistance value of feedback resistor (Rf); and feedback resistor (Rf) ) 13 is provided.
- the feedback resistor 13 has both the conversion function of converting the current signal into a voltage signal and the gain control function of the inverting amplifier 12, and thus is included in each component of the TIA 5 and the AGC unit 6 as described above. ! /
- the optical receiver shown in FIG. 1 the light receiving element
- the optical signal received by the child 1 is converted into a current signal, and then converted into a voltage signal by the TIA5.
- the average value of the output amplitude is continuously detected by the average value detection circuit 14 which is the first average value detection circuit, and a difference voltage from the reference voltage 15 is generated by the comparison circuit 16.
- the feedback resistor drive circuit 17 drives (variably controls) the value of the feedback resistor 13 based on the output signal of the comparison circuit 16.
- AGC control is performed so that the amplitude determined by the reference voltage 15 is obtained.
- a predetermined threshold voltage is generated and output as an output from the ATC unit 7 to the identification circuit 18 by the average value detection circuit 19 which is a second average value detection circuit. Based on the identification level according to the received light power of the element 1, the above-described identification reproduction process is performed.
- an actual optical burst signal includes an amplitude fluctuation component caused by a transient response as described in the above-described problem. Therefore, the transient response operation in the optical receiver to which the conventional technique is applied will be described next.
- Figure 2-1 is a diagram for explaining the operation of an optical receiver to which the conventional technology is applied (ideal operation when transient response is not considered).
- Each operation description in Fig. 2-1 and Fig. 2-2 described later assumes an optical receiver having a general configuration to which the conventional technology is applied.
- FIG. 2A is a diagram showing an ideal optical signal waveform when a transient response is not considered (assuming that there is no transient response).
- this optical signal is converted into a current signal by the light receiving element and input to the preamplifier, the first pulse of the burst signal exceeds the level at which AGC operates (level 1).
- the AGC gain is instantly reduced and the output amplitude is limited ((b) in the figure).
- the identification reproduction unit 3 operates the ATC, and the threshold level for identification is the upper limit level of the signal pulse (“ It is set to an intermediate level between the “High” level and the lower limit level (“Low” level) (( c )).
- the AGC operates when gain switching is necessary, and the ATC unit also operates to generate an identification level according to the amplitude of the input signal to itself. Therefore, in an optical receiver having a general configuration to which the conventional technology is applied, as long as the operation in the case where there is no transient response is considered, the existence of a problem can be found and difficult.
- Fig. 2-2 is a diagram for explaining the operation when considering the transient response in the optical receiver to which the conventional technology is applied.
- FIG. 2A is a diagram showing an optical signal waveform when a transient response is taken into consideration.
- this optical signal is converted into a current signal by the light receiving element and input to the preamplifier, in the example shown in FIG. 5B, the level when the second pulse force AGC of the burst signal is activated. Since (level 1) is exceeded, the AGC gain is reduced and the output amplitude is limited.
- the waveform indicated by the solid line is the waveform when the AGC operates, while the waveform indicated by the wavy line is the waveform when it is assumed that the AGC does not operate. As shown in Fig.
- Figure (c) is a waveform showing the output signal of the preamplifier when the AGC does not operate.
- the ATC operates in the identification / reproduction unit, and the threshold level power for identification, for example, the upper limit level (“Highj level”) and the lower limit level (“ Low level)).
- the threshold level for identification, for example, the upper limit level (“Highj level”) and the lower limit level (“ Low level)
- the seventh and subsequent pulses of the burst signal input to the identification / reproduction unit 3 are erroneously identified. Note that when the AGC operation is considered (assuming that the AGC operates), the signal level input to the identification / reproduction unit further decreases, and the identification error rate further deteriorates.
- FIG. 3 is a diagram for explaining the operation when considering the transient response in the optical receiver of the present embodiment.
- FIG. 3 shows a waveform of an optical signal when a transient response similar to FIG. 2-2 (a) is considered.
- this optical signal is converted into a current signal by the light receiving element 1 in FIG. 1 and is input to the preamplifier 2, for example, as shown in FIG.
- Pulse output level force Even if the reference voltage 15 that is one of the input signals input to the comparator circuit 16 exceeds the average value that is the other input signal that is input to the comparator circuit 16, the average value of the detection circuit 14 force Since the output does not exceed the reference voltage 15, or even if it exceeds, the decrease in the AGC gain is small.Therefore, within this transient response period, the AGC is hardly applied and the signal waveform of the light receiving element output signal is maintained. As a result, unintended gain switching in the AGC unit is prevented.
- the signal waveform shown in FIG. 3B is input to the identification / reproduction unit 3 as an output waveform of the preamplifier 2.
- the average value detection circuit 19 of the ATC unit 7 operates, and the threshold level for identification is set to the upper limit level (“: High” level) and the lower limit level (“Low” level) of each pulse of the burst signal. "Level”) and an intermediate level. Therefore, the threshold level follows the approximate median value (average value) of the upper limit level and the lower limit level of each pulse, so that a threshold level that does not cause an erroneous identification reproduction process is generated.
- the preamplifier unit outputs the output of the first average value detection circuit that detects the average value of its output signal and the predetermined reference. Based on the comparison output with the voltage, its own amplification gain is controlled, and the discriminating / reproducing unit performs signal discrimination of the input signal from the output of the second average value detection circuit that detects the average value of the input signal to the discrimination circuit. Since this is output to the identification circuit as a threshold, unintended V and gain switching in the preamplifier is prevented, and a threshold level can be generated without erroneous identification reproduction processing.
- the force shown for the configuration for controlling the gain of the TIA that is, the gain of the preamplifier, based on the feedback resistance control of the feedback resistance drive circuit. It is not limited. For example, any configuration that can control the gain of the preamplifier based on a comparison result between the average value detection circuit and a predetermined reference voltage is included in the present invention.
- FIG. 4 is a block diagram showing a configuration of the optical receiver according to the second exemplary embodiment of the present invention.
- the identification reproduction unit 3 of the optical receiver shown in the figure is provided with an identification circuit 21 that outputs a normal phase output and a reverse phase output instead of the configuration of the identification circuit 21 of the first embodiment.
- the comparison circuit 22 which is a second comparison circuit that generates a differential voltage between the two-phase outputs of the circuit 21 and the output (difference voltage) of the comparison circuit 22 based on the signal level of the control signal 24 are held.
- the ATC unit 7 further includes a buffer unit 12 connected to the output side of the average value detection circuit 19 and to which the output (offset adjustment signal) of the offset adjustment circuit 25 is input.
- the output of the notch unit 26 is input to the identification circuit 21.
- Other configurations are the same as or equivalent to those of the first embodiment shown in FIG. 1, and those components are denoted by the same reference numerals and description thereof is omitted. In the following description, the operation different from that of the first embodiment will be mainly described.
- the comparison circuit 22 generates a differential voltage between the positive phase output and the negative phase output of the identification circuit 21 and outputs it to the SZH circuit 23.
- This control signal 24 indicates the operation mode of the SZH circuit 23 composed of the sample mode and the hold mode.
- S ZH circuit 23 holds the sampled voltage when the signal level of control signal 24 indicates the hold mode, and offsets the sampled voltage when the signal level of control signal 24 indicates the sample mode.
- the second average value circuit based on the output of the sample 'hold circuit that holds or transmits the comparison output that compares the differential outputs of the identification circuit. Therefore, the feedback component is controlled so that the voltage difference between the differential outputs of the identification circuit becomes almost zero, reducing the variation in sensitivity of the optical receiver itself. Can be made.
- FIG. 5 is a diagram for explaining the operation of the optical receiver according to the third embodiment of the present invention.
- (a) shows a burst signal having an optical signal waveform in which a transient response occurs.
- each output of the optical receiver that is, the solid line portion indicates, for example, the normal phase output of the identification circuit 21, and the broken line portion indicates, for example, the reverse phase output of the identification circuit 21.
- FIG. 2C shows an example of the control signal waveform of the control signal 24 input to the SZH circuit 23.
- the feature of this embodiment is the output mode of the control signal 24 shown in FIG. 5 (c), and the operation mode of the SZH circuit 23 becomes the sample mode only during the no-signal period after the power is turned on. Control signal 24 is output. Therefore, the output offset during the no-signal period after power-on is minimized. Since the output offset in the no-signal period after power-on is minimized, the no-signal period similar to the no-signal period after power-on (in the example of FIG. 5, between the first packet and the second packet). The output offset minimized state can be maintained even between the first packet and between the second packet after the second packet).
- the offset control by the offset adjustment circuit is performed during the no-signal period after the power is turned on, so that the output offset minimization state can be effectively achieved. Can be maintained.
- FIG. 6 is a diagram for explaining the operation of the optical receiver according to the fourth embodiment of the present invention.
- the force for instructing the operation mode of the SZH circuit 23 to be in the sample mode only during the non-signal period after the power is turned on.
- the operation mode of the SZH circuit 23 is set to all the optical signals. Instruct and enter sample mode in no signal area.
- the no-signal period after power-on is set to be in the hold mode.
- the operation mode in this period may be set to be in the sample mode.
- the output offset component may be accumulated and gradually increase.
- the operation mode of the SZH circuit 23 is set to the sample mode for all non-signal areas of the optical signal, so that accumulation of the output offset component is suppressed, and the offset component deteriorates with time! / It is possible to reduce aging degradation.
- the optical receiver according to the present invention is useful for, for example, a PON system that transmits a burst-like optical signal, and particularly when the transient response of an input signal becomes a problem. 1 ⁇ then 0
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- Computer Networks & Wireless Communication (AREA)
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Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200580002707.5A CN101243663B (zh) | 2005-09-28 | 2005-09-28 | 光接收器及其识别阈值生成方法 |
JP2007537493A JP4532563B2 (ja) | 2005-09-28 | 2005-09-28 | 光受信器およびその識別閾値生成方法 |
PCT/JP2005/017812 WO2007036993A1 (ja) | 2005-09-28 | 2005-09-28 | 光受信器およびその識別閾値生成方法 |
EP05788349A EP1931095B1 (en) | 2005-09-28 | 2005-09-28 | Light receiver and its identification threshold value generation method |
US10/585,458 US7609980B2 (en) | 2005-09-28 | 2005-09-28 | Optical receiver and discrimination-threshold generating method |
TW095132130A TWI327835B (en) | 2005-09-28 | 2006-08-31 | Optical receiver and discrimination-threshold generating method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2005/017812 WO2007036993A1 (ja) | 2005-09-28 | 2005-09-28 | 光受信器およびその識別閾値生成方法 |
Publications (1)
Publication Number | Publication Date |
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WO2007036993A1 true WO2007036993A1 (ja) | 2007-04-05 |
Family
ID=37899432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/017812 WO2007036993A1 (ja) | 2005-09-28 | 2005-09-28 | 光受信器およびその識別閾値生成方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7609980B2 (ja) |
EP (1) | EP1931095B1 (ja) |
JP (1) | JP4532563B2 (ja) |
CN (1) | CN101243663B (ja) |
TW (1) | TWI327835B (ja) |
WO (1) | WO2007036993A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010082585A1 (ja) * | 2009-01-19 | 2010-07-22 | 株式会社日立製作所 | トランスインピーダンスアンプおよびponシステム |
CN101651497B (zh) * | 2008-08-13 | 2013-10-09 | 华为技术有限公司 | 光接收机增益控制方法和的光接收装置 |
JP2014003567A (ja) * | 2012-06-21 | 2014-01-09 | Hitachi Ltd | トランスインピーダンスアンプ |
JP2016201736A (ja) * | 2015-04-13 | 2016-12-01 | 富士通株式会社 | 信号識別回路、これを用いた光受信器、及び信号識別方法 |
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JP4503624B2 (ja) * | 2006-03-30 | 2010-07-14 | 住友電工デバイス・イノベーション株式会社 | 電子回路 |
US7601940B2 (en) * | 2007-03-22 | 2009-10-13 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Gain control system for visible light communication systems |
JP5028179B2 (ja) * | 2007-08-03 | 2012-09-19 | 株式会社日立製作所 | Ponシステム |
JP2010093353A (ja) * | 2008-10-03 | 2010-04-22 | Sumitomo Electric Ind Ltd | 光受信器 |
JP5481240B2 (ja) * | 2010-03-12 | 2014-04-23 | 株式会社日立製作所 | マルチレート用バーストモード受信機 |
JP5480010B2 (ja) * | 2010-05-14 | 2014-04-23 | 株式会社東芝 | 光受信回路 |
JP5279956B2 (ja) * | 2011-04-05 | 2013-09-04 | 三菱電機株式会社 | 光受信器 |
CN102412906A (zh) * | 2011-08-08 | 2012-04-11 | 中兴通讯股份有限公司 | 差分四相相移键控接收机及其增益控制方法 |
JP5921130B2 (ja) * | 2011-10-12 | 2016-05-24 | アズビル株式会社 | 光電センサ |
WO2014112051A1 (ja) * | 2013-01-16 | 2014-07-24 | 三菱電機株式会社 | 前置増幅器、光受信器、光終端装置及び光通信システム |
DE102014109716B4 (de) * | 2013-07-11 | 2017-11-16 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Ein Stossbetriebsempfänger, welcher einen großen Dynamikbereich und niedrige Pulsweitenverzerrung hat und ein Verfahren |
US9325426B2 (en) * | 2013-07-11 | 2016-04-26 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Burst-mode receiver having a wide dynamic range and low pulse-width distortion and a method |
US10481246B2 (en) * | 2017-05-22 | 2019-11-19 | Analog Devices Global Unlimited Company | Photo-diode emulator circuit for transimpedance amplifier testing |
US11005573B2 (en) * | 2018-11-20 | 2021-05-11 | Macom Technology Solutions Holdings, Inc. | Optic signal receiver with dynamic control |
CN114175531B (zh) * | 2019-08-09 | 2024-03-22 | 三菱电机株式会社 | 光接收器和站侧装置 |
TWI687048B (zh) * | 2019-11-04 | 2020-03-01 | 茂達電子股份有限公司 | 高線性光感測器 |
US12013423B2 (en) | 2020-09-30 | 2024-06-18 | Macom Technology Solutions Holdings, Inc. | TIA bandwidth testing system and method |
US11658630B2 (en) | 2020-12-04 | 2023-05-23 | Macom Technology Solutions Holdings, Inc. | Single servo loop controlling an automatic gain control and current sourcing mechanism |
US11381318B1 (en) * | 2021-07-30 | 2022-07-05 | II-VI Delaware, Inc | Control of trans-impedance amplifier (TIA) during settling after recovering from loss of signal in receiver |
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2005
- 2005-09-28 WO PCT/JP2005/017812 patent/WO2007036993A1/ja active Application Filing
- 2005-09-28 JP JP2007537493A patent/JP4532563B2/ja not_active Expired - Fee Related
- 2005-09-28 CN CN200580002707.5A patent/CN101243663B/zh not_active Expired - Fee Related
- 2005-09-28 EP EP05788349A patent/EP1931095B1/en not_active Expired - Fee Related
- 2005-09-28 US US10/585,458 patent/US7609980B2/en not_active Expired - Fee Related
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2006
- 2006-08-31 TW TW095132130A patent/TWI327835B/zh not_active IP Right Cessation
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101651497B (zh) * | 2008-08-13 | 2013-10-09 | 华为技术有限公司 | 光接收机增益控制方法和的光接收装置 |
WO2010082585A1 (ja) * | 2009-01-19 | 2010-07-22 | 株式会社日立製作所 | トランスインピーダンスアンプおよびponシステム |
JP5272021B2 (ja) * | 2009-01-19 | 2013-08-28 | 株式会社日立製作所 | トランスインピーダンスアンプおよびponシステム |
US8653433B2 (en) | 2009-01-19 | 2014-02-18 | Hitachi, Ltd. | Transimpedance amplifier and PON system |
JP2014003567A (ja) * | 2012-06-21 | 2014-01-09 | Hitachi Ltd | トランスインピーダンスアンプ |
JP2016201736A (ja) * | 2015-04-13 | 2016-12-01 | 富士通株式会社 | 信号識別回路、これを用いた光受信器、及び信号識別方法 |
Also Published As
Publication number | Publication date |
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US7609980B2 (en) | 2009-10-27 |
JPWO2007036993A1 (ja) | 2009-04-02 |
TW200713873A (en) | 2007-04-01 |
CN101243663A (zh) | 2008-08-13 |
CN101243663B (zh) | 2011-04-13 |
JP4532563B2 (ja) | 2010-08-25 |
EP1931095A4 (en) | 2010-04-28 |
US20070098416A1 (en) | 2007-05-03 |
TWI327835B (en) | 2010-07-21 |
EP1931095B1 (en) | 2012-01-18 |
EP1931095A1 (en) | 2008-06-11 |
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