WO2015133080A1 - 光受信回路 - Google Patents
光受信回路 Download PDFInfo
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- WO2015133080A1 WO2015133080A1 PCT/JP2015/000838 JP2015000838W WO2015133080A1 WO 2015133080 A1 WO2015133080 A1 WO 2015133080A1 JP 2015000838 W JP2015000838 W JP 2015000838W WO 2015133080 A1 WO2015133080 A1 WO 2015133080A1
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- voltage
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- light
- photocurrent
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- 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
-
- 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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/08—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding
-
- 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
- H04B10/697—Arrangements for reducing noise and distortion
-
- 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
-
- 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
Definitions
- the present disclosure relates to an optical receiving circuit.
- a conventional optical receiving circuit includes a head amplifier, a dummy amplifier, a peak detection unit, an average value detection unit, and a differential amplifier.
- the peak detector detects the peak voltage between the head amplifier and the differential amplifier.
- the peak detector outputs the detected peak voltage to the average value detector.
- the average value detector calculates a threshold voltage from the peak voltage input from the peak detector and the voltage input from the dummy amplifier, and outputs the threshold voltage to the differential amplifier.
- the conventional optical receiver circuit suppresses the distortion of the output waveform output by the differential amplifier by generating the threshold voltage using the peak detection unit and the average value detection unit.
- Patent Document 1 is known.
- the light receiving circuit includes a first light receiver, a first transimpedance amplifier, a level shift circuit, a second light receiver, a second transimpedance amplifier, a peak hold circuit, and a comparator.
- the first light receiver receives the optical signal and converts it into a first photocurrent.
- the first transimpedance amplifier is connected to the first light receiver and converts the first photocurrent into a first voltage.
- the level shift circuit is connected to the first transimpedance amplifier and generates a signal voltage obtained by shifting the first voltage to the low voltage side.
- the second light receiver receives the optical signal and converts it into a second photocurrent.
- the second transimpedance amplifier is connected to the second light receiver and converts the second photocurrent into a second voltage that is greater than the minimum signal voltage and less than the maximum signal voltage.
- the peak hold circuit is connected to the second transimpedance amplifier and holds the peak voltage of the second voltage as the first threshold voltage.
- the comparator is connected to the level shift circuit and the peak hold circuit, and compares the signal voltage with the first threshold voltage.
- FIG. 1 is a schematic block diagram of an optical receiver circuit according to the first embodiment.
- FIG. 2 is a diagram illustrating a relationship between the first voltage and the second voltage of the optical receiver circuit according to the first embodiment.
- FIG. 3 is a diagram illustrating the relationship among the signal voltage of the optical receiver circuit, the threshold voltage, and the output waveform of the comparator according to the first embodiment.
- FIG. 4 is a schematic block diagram of the optical receiver circuit according to the second embodiment.
- FIG. 5 is a schematic block diagram of an optical receiver circuit according to the third embodiment.
- FIG. 6 is a schematic block diagram of an optical receiver circuit according to the fourth embodiment.
- FIG. 7 is a schematic block diagram of an optical receiver circuit according to the fifth embodiment.
- FIG. 8 is a schematic block diagram of another optical receiver circuit according to the fifth embodiment.
- FIG. 1 is a schematic block diagram of an optical receiver circuit 10 according to the first embodiment.
- FIG. 2 is a diagram illustrating the relationship between the first voltage Va and the second voltage Vb of the optical receiver circuit 10 according to the first embodiment.
- FIG. 3 is a diagram illustrating a relationship among the signal voltage Vio, the threshold voltage Vth, and the output waveform (voltage Vo) of the comparator according to the first embodiment.
- the optical receiving circuit 10 includes a first light receiver 11, a first transimpedance amplifier (hereinafter referred to as a first TIA) 12, a level shift circuit 13, a second light receiver 31, and a second transimpedance amplifier (hereinafter referred to as a “first transimpedance amplifier”). (Referred to as a second TIA) 32, a peak hold circuit 15, and a comparator 16.
- the first light receiver 11 receives an optical signal and converts it into a first photocurrent.
- the first transimpedance amplifier 12 is connected to the first light receiver 11 and converts the first photocurrent into the first voltage.
- the level shift circuit 13 is connected to the first transimpedance amplifier 12 and generates a signal voltage obtained by shifting the first voltage to the low voltage side.
- the second light receiver 31 receives an optical signal and converts it into a second photocurrent.
- the second transimpedance amplifier 32 is connected to the second light receiver 31 and converts the second photocurrent into a second voltage that is larger than the minimum signal voltage and lower than the maximum signal voltage.
- the peak hold circuit 15 is connected to the second transimpedance amplifier, and holds the peak voltage of the second voltage as the first threshold voltage.
- the comparator 16 is connected to the level shift circuit 13 and the peak hold circuit 15, and compares the signal voltage with the first threshold voltage.
- the conversion circuit 14 is configured by the second light receiver 31 and the second transimpedance amplifier 32.
- the first light receiver 11 has a first photodiode 21 and converts the received optical signal into a photocurrent Ipd1 (first photocurrent).
- the anode side of the first photodiode 21 is grounded.
- the cathode side of the first photodiode 21 is connected to the input side of the first TIA 12.
- the output side of the first TIA 12 is connected to the input side of the level shift circuit 13.
- the first TIA 12 converts the photocurrent Ipd1 flowing through the first photodiode 21 into a voltage Va (hereinafter referred to as the first voltage Va) and outputs it to the level shift circuit 13.
- the conversion impedance of the first TIA 12 is r1 [ ⁇ ]
- the voltage value of the voltage Vi on the cathode side of the first photodiode 21 is vi [V]
- the current value of the photocurrent Ipd1 flowing through the first photodiode 21 is ipd1 [ A].
- the voltage value va [V] of the first voltage Va is expressed by the following equation (1).
- the output side of the level shift circuit 13 is connected to the inverting input side of the comparator 16.
- the level shift circuit 13 shifts the first voltage Va in the minus direction by a predetermined shift amount ⁇ Vs, and outputs the shifted voltage Vio (hereinafter referred to as a signal voltage Vio) to the comparator 16.
- the shift amount ⁇ Vs is smaller than 1 ⁇ 2 of the displacement width A1 of the first voltage Va.
- the displacement width A1 of the first voltage Va is a range (displacement width) between the minimum voltage Vi of the first voltage Va and the maximum voltage Vamax of the first voltage Va.
- the displacement width of the signal voltage Vio is equal to the displacement width A1 of the first voltage Va.
- the second light receiver 31 has a second photodiode 35.
- the anode side of the second photodiode 35 is grounded.
- the cathode side of the second photodiode 35 is connected to the input side of the second TIA 32.
- the second photodiode 35 receives the optical signal and converts the received optical signal into a photocurrent Ipd2 (second photocurrent).
- the optical signal received by the first photodiode 21 and the second photodiode 35 is a signal output from a common light source.
- the light receiving area where the second photodiode 35 receives the optical signal is 1 ⁇ 2 of the light receiving area where the first photodiode 21 receives the optical signal.
- the photoelectric conversion efficiency for converting the optical signal per unit area of the second photodiode 35 into a photocurrent and the photoelectric conversion efficiency for converting the optical signal per unit area of the first photodiode 21 into a photocurrent are equal.
- the photoelectric conversion efficiency is conversion efficiency for converting an optical signal per unit area into a photocurrent.
- the output side of the second TIA 32 is connected to the input side of the peak hold circuit 15.
- the second TIA 32 converts the photocurrent Ipd2 flowing through the second photodiode 35 into the second voltage Vb and outputs it to the peak hold circuit 15.
- the voltage on the cathode side of the second photodiode 35 is at the same level (vi [V]) as the voltage Vi of the first photodiode 21 when no optical signal is received.
- the conversion impedance of the second TIA 32 is r2 [ ⁇ ]
- the current value of the photocurrent Ipd2 flowing through the second photodiode 35 is ipd2 [A].
- the voltage value vb [V] of the second voltage Vb is expressed by the following equation (2).
- the displacement width A2 of the second voltage Vb is 1/2 of the displacement width A1 of the first voltage Va.
- the displacement width A2 of the second voltage Vb is a range (displacement width) between the minimum voltage Vi of the second voltage Vb and the maximum voltage Vbmax of the second voltage Vb, as shown in FIG.
- the displacement width A2 of the second voltage Vb is 1 ⁇ 2 of the displacement width A1 of the first voltage Va. Further, the shift amount ⁇ Vs for shifting the first voltage Va to the signal voltage Vio by the level shift circuit 13 is smaller than a value represented by 1 ⁇ 2 of the displacement width A1. Then, as shown in FIG. 3, the maximum voltage Vbmax of the second voltage becomes less than the maximum voltage Vmax of the signal voltage Vio.
- the first voltage Va and the second voltage Vb are the same voltage Vi according to the above-described equations (1) and (2). It has become. Further, the shift amount by which the level shift circuit 13 shifts the first voltage Va to the signal voltage Vio is ⁇ Vs. Then, the minimum voltage Vi of the second voltage Vb is larger than the minimum voltage Vmin of the signal voltage Vio as shown in FIG.
- the output side of the peak hold circuit 15 is connected to the non-inverting input side of the comparator 16.
- the peak hold circuit 15 holds the peak voltage of the second voltage Vb.
- the peak hold circuit 15 includes a capacitor (not shown), and this capacitor charges and discharges.
- holding the voltage means that the voltage drop due to the discharge is within the error range.
- the comparator 16 includes an operational amplifier 16a, compares the signal voltage Vio with the threshold voltage Vth (first threshold voltage), and outputs the voltage Vo.
- the first voltage Va and the second voltage Vb are the same voltage Vi according to the above-described expressions (1) and (2).
- the first voltage Va is shifted in the minus direction by the shift amount ⁇ Vs by the level shift circuit 13.
- the peak hold circuit 15 outputs a threshold voltage Vth that is substantially equal to the second voltage Vb. As a result, the signal voltage Vio becomes lower than the threshold voltage Vth, so that the voltage Vo output from the comparator 16 becomes the high level H.
- the first voltage Va is a voltage obtained by the above equation (1).
- the photocurrent Ipd1 increases, and the first voltage Va and the signal voltage Vio increase.
- the conversion circuit 14 receives the optical signal, the photocurrent Ipd2 increases, and the second voltage Vb and the threshold voltage Vth increase.
- the displacement width A1 of the signal voltage Vio is larger than the displacement width A2 of the threshold voltage Vth, there is a point in time when the magnitude relationship between the signal voltage Vio and the threshold voltage Vth is reversed. Therefore, when the signal voltage Vio reaches the threshold voltage Vth while each of the signal voltage Vio and the threshold voltage Vth is increasing (time t1 in FIG. 3), the voltage Vo output from the comparator 16 is low level L It becomes.
- the photocurrent Ipd1 flowing through the first light receiver 11 decreases, and the first voltage Va and the signal voltage Vio also decrease.
- the second voltage Vb also decreases, the peak voltage (Vbmax in FIG. 3) is held by the peak hold circuit 15. Therefore, at a certain time (time t2 in FIG. 2), the signal voltage Vio becomes the same as the threshold voltage Vth, and the voltage Vo output from the comparator 16 becomes the high level H.
- the signal voltage Vio increases as described above, and the signal voltage Vio becomes the threshold voltage Vth at a certain time (t3 in FIG. 3). To reach. At this time, the voltage Vo output from the comparator 16 becomes a low level L.
- the peak hold circuit 15 holds the peak voltage of the second voltage Vb, the distortion of the output waveform of the voltage Vo output from the comparator 16 can be reduced.
- the threshold voltage Vth is generated using the peak hold circuit 15.
- the conventional optical receiver circuit generates a threshold voltage using a peak detector and an average value detector.
- the optical receiver circuit 10 generates the threshold voltage Vth with fewer circuit components than the conventional optical receiver circuit. Thereby, the optical receiving circuit 10 can reduce the current consumption when generating the threshold voltage Vth as compared with the conventional case.
- the conversion circuit 14 and the comparator 16 are connected via the peak hold circuit 15.
- the optical receiver circuit 10 uses the level shift circuit 13 and the peak hold circuit 15 to generate a threshold voltage Vth that is greater than the minimum voltage of the signal voltage Vio and less than the maximum voltage of the signal voltage Vio. Then, the optical receiver circuit 10 outputs the voltage Vo based on the threshold voltage Vth. As a result, distortion of the output waveform of the comparator 16 is suppressed.
- the light receiving area of the second photodiode 35 is made smaller than the light receiving area of the first photodiode 21.
- the optical receiver circuit 10 can adjust the displacement width of the threshold voltage Vth by making the photocurrent Ipd2 flowing through the second light receiver 31 smaller than the photocurrent Ipd1 flowing through the first light receiver 11.
- the optical receiver circuit 10 adjusts the displacement width of the threshold voltage Vth according to the photocurrent Ipd2. Therefore, as the first TIA 12 and the second TIA 32, TIA having the same conversion efficiency for converting the photocurrent into the voltage can be used.
- the displacement width A2 of the second voltage Vb is set to 1 ⁇ 2 of the displacement width A1 of the first voltage Va.
- the optical receiver circuit 10 generates a threshold voltage Vth that is close to 1 ⁇ 2 of the fluctuation range of the signal voltage Vio. Then, the optical receiver circuit 10 outputs the voltage Vo based on the threshold voltage Vth. Therefore, distortion of the output waveform of the comparator 16 is further suppressed.
- FIG. 4 is a schematic block diagram of the optical receiver circuit 20 in the second embodiment.
- the optical receiving circuit 20 is different from the first embodiment in that the second light receiver 31 includes a second photodiode 36 different from the second photodiode 35 and a light shielding portion 37.
- the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
- the anode side of the second photodiode 36 is grounded.
- the cathode side of the second photodiode 36 is connected to the input side of the second TIA 32.
- the light receiving area where the second photodiode 36 receives the optical signal is equal to the light receiving area where the first photodiode 21 receives the optical signal.
- the first photodiode 21 and the second photodiode 36 are formed of the same element.
- the light shielding portion 37 is formed of a member that does not transmit light.
- the light shielding portion 37 is installed so as to cover 1/2 of the light receiving area of the second photodiode 36. Thereby, the light quantity of the optical signal received by the second photodiode 36 is 1 ⁇ 2 of the light quantity of the optical signal received by the first photodiode 21. Therefore, the photocurrent Ipd2 of the second photodiode 36 is 1 ⁇ 2 of the photocurrent Ipd1 of the first photodiode 21.
- optical receiver circuit 20 of the present embodiment are the same as those of the first embodiment, and thus description thereof is omitted.
- the threshold voltage Vth is generated using the peak hold circuit 15.
- the conventional optical receiver circuit generates a threshold voltage using a peak detector and an average value detector.
- the optical receiver circuit 20 generates the threshold voltage Vth with fewer circuit components than the conventional optical receiver circuit. Thereby, the optical receiver circuit 20 can reduce the current consumption when generating the threshold voltage Vth as compared with the conventional case.
- the conversion circuit 142 and the comparator 16 are connected via the peak hold circuit 15.
- the optical receiver circuit 20 uses the peak hold circuit 15 or the like to generate a threshold voltage Vth that is greater than the minimum voltage of the signal voltage Vio and less than the maximum voltage of the signal voltage Vio. Then, the optical receiver circuit 20 outputs the voltage Vo based on the threshold voltage Vth. As a result, distortion of the output waveform of the comparator 16 is suppressed.
- the light shielding portion 37 is provided in the second photodiode 36, and the amount of the optical signal received by the second photodiode 36 is determined based on the optical signal received by the first photodiode 21. It is smaller than the amount of light.
- the displacement width of the threshold voltage Vth can be adjusted.
- the optical receiver circuit 20 adjusts the displacement width of the threshold voltage Vth according to the photocurrent Ipd2. Therefore, as the first TIA 12 and the second TIA 32, TIA having the same conversion efficiency for converting the photocurrent into the voltage can be used.
- the displacement width A2 of the second voltage Vb is set to 1 ⁇ 2 of the displacement width A1 of the first voltage Va.
- the optical receiving circuit 20 generates a threshold voltage Vth that is close to 1 ⁇ 2 of the fluctuation range of the signal voltage Vio.
- the optical receiver circuit 20 outputs the voltage Vo based on the threshold voltage Vth. Therefore, distortion of the output waveform of the comparator 16 is further suppressed.
- FIG. 5 is a schematic block diagram of the optical receiver circuit 30 in the third embodiment.
- the optical receiver circuit 30 according to the present embodiment is different from the first embodiment in that the second light receiver 31 includes a second photodiode 38 different from the second photodiode 35. Furthermore, the point that the conversion circuit 143 includes a second TIA 33 different from the second TIA 32 is different from the first embodiment. Further, the configuration of the first TIA 12 is also different from that of the first embodiment.
- the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
- the anode side of the second photodiode 38 is grounded.
- the cathode side of the second photodiode 38 is connected to the input side of the second TIA 33.
- the light receiving area where the second photodiode 38 receives the optical signal is equal to the light receiving area where the first photodiode 21 receives the optical signal.
- the first photodiode 21 and the second photodiode 38 are formed of the same element.
- the first TIA 12 includes a first amplifier 41 and a first resistor 45 as shown in FIG.
- the first resistor 45 is connected to the first amplifier 41 in parallel.
- the first resistor 45 is connected between the input side and the output side of the first amplifier 41.
- the input side of the first amplifier 41 is connected to the output side of the first photodiode 21, and the output side of the first amplifier 41 is connected to the input side of the level shift circuit 13.
- the second TIA 33 includes a second amplifier 42 and a second resistor 46 as shown in FIG.
- the second resistor 46 is connected in parallel to the second amplifier 42.
- the resistance value of the second resistor 46 is lower than the resistance value of the first resistor 45.
- the resistance value of the second resistor 46 is 1 ⁇ 2 of the resistance value of the first resistor 45.
- the second resistor 46 is connected between the input side and the output side of the second amplifier 42.
- the input side of the second amplifier 42 is connected to the output side of the second photodiode 38, and the output side of the second amplifier 42 is connected to the input side of the peak hold circuit 15.
- the displacement width of the second voltage Vb is 1 ⁇ 2 of the displacement width of the first voltage Va.
- optical receiver circuit 30 of the present embodiment are the same as those of the first embodiment, and thus description thereof is omitted.
- the threshold voltage Vth is generated using the peak hold circuit 15.
- the conventional optical receiver circuit generates a threshold voltage using a peak detector and an average value detector.
- the optical receiver circuit 30 generates the threshold voltage Vth with fewer circuit components than the conventional optical receiver circuit. Thereby, the optical receiver circuit 30 can reduce the current consumption when generating the threshold voltage Vth as compared with the conventional case.
- the conversion circuit 143 and the comparator 16 are connected via the peak hold circuit 15.
- the optical receiver circuit 30 uses the peak hold circuit 15 or the like to generate a threshold voltage Vth that is greater than the minimum voltage of the signal voltage Vio and less than the maximum voltage of the signal voltage Vio. Then, the optical receiver circuit 30 outputs the voltage Vo based on the threshold voltage Vth. As a result, distortion of the output waveform of the comparator 16 is suppressed.
- the second voltage Vb output from the second TIA 32 is made smaller than the first voltage Va by setting the resistance value of the second resistor 46 to 1 ⁇ 2 of the resistance value of the first resistor 45. is doing. Therefore, as the first light receiver 11 and the second light receiver 31, light receivers having the same light receiving area and the same photoelectric conversion efficiency for converting the received optical signal into a photocurrent are used, and the displacement width of the threshold voltage Vth Can be adjusted.
- the displacement width A2 of the second voltage Vb is set to 1 ⁇ 2 of the displacement width A1 of the first voltage Va.
- the optical receiving circuit 30 generates a threshold voltage Vth that is close to 1 ⁇ 2 of the fluctuation range of the signal voltage Vio.
- the optical receiver circuit 30 outputs the voltage Vo based on the threshold voltage Vth. Therefore, distortion of the output waveform of the comparator 16 is further suppressed.
- FIG. 6 is a schematic block diagram of the optical receiver circuit 40 in the fourth embodiment.
- the optical receiver circuit 40 of the present embodiment is different from the first embodiment in that the second light receiver 31 includes a second photodiode 39 that is different from the second photodiode 35. To do.
- the point which the 1st light receiver 11 is provided with the 1st photodiode 21 and the 3rd photodiode 51 differs from Embodiment 1.
- FIG. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
- the anode side of the third photodiode 51 is grounded.
- the cathode side of the third photodiode 51 is connected to the input side of the first TIA 12.
- the anode side of the second photodiode 39 is grounded.
- the cathode side of the second photodiode 39 is connected to the input side of the second TIA 32.
- the light receiving area where the third photodiode 51 receives the optical signal and the light receiving area where the second photodiode 39 receives the optical signal are equal to the light receiving area where the first photodiode 21 receives the optical signal.
- the photocurrent Ipd1 flowing through the first photodiode 21, the photocurrent Ipd2 flowing through the second photodiode 39, and the photocurrent Ipd3 flowing through the third photodiode 51 become equal.
- the 1st photodiode 21 and the 3rd photodiode 51 are mutually connected in parallel. Therefore, the displacement width A2 of the second voltage Vb is 1 ⁇ 2 of the displacement width A1 of the first voltage Va.
- optical receiver circuit 40 of the present embodiment are the same as those of the first embodiment, and thus description thereof is omitted.
- the threshold voltage Vth is generated using the peak hold circuit 15.
- the conventional optical receiver circuit generates a threshold voltage using a peak detector and an average value detector.
- the optical receiver circuit 40 generates the threshold voltage Vth with fewer circuit components than the conventional optical receiver circuit. Thereby, the optical receiver circuit 40 can reduce the current consumption when generating the threshold voltage Vth as compared with the conventional case.
- the conversion circuit 144 and the comparator 16 are connected via the peak hold circuit 15.
- the optical receiver circuit 40 uses the peak hold circuit 15 or the like to generate a threshold voltage Vth that is greater than the minimum voltage of the signal voltage Vio and less than the maximum voltage of the signal voltage Vio. Then, the optical receiver circuit 40 outputs the voltage Vo based on the threshold voltage Vth. As a result, distortion of the output waveform of the comparator 16 is suppressed.
- the optical receiver circuit 40 of this embodiment includes the first photodiode 21 and the third photodiode 51 in the first light receiver 11.
- the optical receiver circuit 40 can adjust the displacement width of the threshold voltage Vth by making the photocurrent flowing through the second light receiver 31 smaller than the photocurrent flowing through the first light receiver 11.
- the optical receiver circuit 40 adjusts the displacement width of the threshold voltage Vth according to the photocurrent Ipd2. Therefore, as the first TIA 12 and the second TIA 32, TIA having the same conversion efficiency for converting the photocurrent into the voltage can be used.
- the displacement width A2 of the second voltage Vb is set to 1 ⁇ 2 of the displacement width A1 of the first voltage Va.
- the optical receiver circuit 40 generates a threshold voltage Vth that is close to 1 ⁇ 2 of the fluctuation range of the signal voltage Vio.
- the optical receiver circuit 40 outputs the voltage Vo based on the threshold voltage Vth. Therefore, distortion of the output waveform of the comparator 16 is further suppressed.
- the first light receiver 11 has two photodiodes connected in parallel. However, two or more photodiodes may be used.
- the second light receiver 31 may have a plurality of photodiodes.
- the displacement width A2 of the second voltage Vb may be made smaller than the displacement width A1 of the first voltage Va by adjusting the number of photodiodes and the connection method. Furthermore, the displacement width A2 of the second voltage Vb is preferably 1 ⁇ 2 of the displacement width A1 of the first voltage Va.
- FIG. 7 is a schematic block diagram of the optical receiver circuit 50 according to the fifth embodiment.
- the optical receiver circuit 50 of the present embodiment is different from the first embodiment in that it includes a holding circuit 61 including a level shift circuit 13 and a peak hold circuit 15. Further, the first embodiment differs from the first embodiment in that the level shift circuit 13 is not connected to the first TIA 12.
- the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
- the input side of the holding circuit 61 is connected to the output side of the conversion circuit 145.
- the configuration of the conversion circuit 145 is the same as that of the conversion circuit 14. That is, the conversion circuit 145 includes the second light receiver 31 and the second TIA 32.
- the second light receiver 31 has a second photodiode 35.
- the second photodiode 35 receives the optical signal and converts the received optical signal into a photocurrent Ipd2 (second photocurrent).
- the output side of the holding circuit 61 is connected to the non-inverting input side of the comparator 16.
- the holding circuit 61 is higher than the second voltage Vb by a predetermined value, greater than the minimum voltage of the first voltage Va, and less than the maximum voltage of the first voltage Va. The peak voltage of the voltage belonging to the range is held.
- the conversion circuit 145 creates a second voltage Vb that is larger than the minimum voltage of the first voltage Va and belongs to a range less than the maximum voltage of the first voltage Va.
- the output side of the conversion circuit 145 is connected to the holding circuit 61.
- the output side of the conversion circuit 145 is connected to the input side of the level shift circuit 13 of the holding circuit 61.
- the level shift circuit 13 shifts the second voltage Vb in the plus direction by the shift amount ⁇ Vs.
- the level shift circuit 13 outputs the shifted voltage to the peak hold circuit 15.
- the shift amount ⁇ Vs is smaller than 1 ⁇ 2 of the displacement width of the first voltage Va.
- the output side of the level shift circuit 13 is connected to the input side of the peak hold circuit 15.
- the peak hold circuit 15 holds a peak voltage.
- the peak hold circuit 15 holds a peak voltage of a voltage that is higher than the second voltage Vb by the shift amount ⁇ Vs and that is larger than the minimum voltage of the first voltage Va and falls within a range less than the maximum voltage of the first voltage Va. To do.
- the output side of the peak hold circuit 15 is connected to the non-inverting input side of the comparator 16.
- the peak hold circuit 15 outputs a threshold voltage Vth (second threshold voltage) substantially equal to the voltage shifted by the level shift circuit 13 to the comparator 16.
- the threshold voltage Vth is generated using the peak hold circuit 15 of the holding circuit 61.
- the conventional optical receiver circuit generates a threshold voltage using a peak detector and an average value detector.
- the optical receiver circuit 50 generates the threshold voltage Vth with fewer circuit components than the conventional optical receiver circuit. Thereby, the optical receiver circuit 50 can reduce the current consumption when generating the threshold voltage Vth as compared with the conventional case.
- the conversion circuit 145 and the comparator 16 are connected via a holding circuit 61 including a level shift circuit 13 and a peak hold circuit 15.
- the optical receiver circuit 50 generates the threshold voltage Vth using the peak hold circuit 15 or the like. Then, the optical receiver circuit 50 outputs the voltage Vo based on the threshold voltage Vth. Therefore, distortion of the output waveform of the comparator 16 is suppressed.
- the level shift circuit 13 is connected between the conversion circuit 145 and the peak hold circuit 15, but the present invention is not limited to this.
- FIG. 8 is a schematic block diagram of another optical receiver circuit 60 according to the fifth embodiment.
- the level shift circuit 13 may be connected between the peak hold circuit 15 and the comparator 16 as shown in FIG.
- the optical receiver circuit 60 has a holding circuit 62 composed of a level shift circuit 13 and a peak hold circuit 15 as shown in FIG.
- the input side of the holding circuit 62 is connected to the output side of the conversion circuit 145.
- the output side of the holding circuit 62 is connected to the non-inverting input side of the comparator 16.
- the holding circuit 62 is higher than the second voltage Vb by a predetermined value, greater than the minimum voltage of the first voltage Va, and less than the maximum voltage of the first voltage Va. The peak voltage of the voltage belonging to the range is held.
- the conversion circuit 145 creates a second voltage Vb that is larger than the minimum voltage of the first voltage Va and belongs to a range less than the maximum voltage of the first voltage Va.
- the output side of the conversion circuit 145 is connected to the holding circuit 62.
- the output side of the conversion circuit 145 is connected to the input side of the peak hold circuit 15 of the holding circuit 62.
- the output side of the peak hold circuit 15 is connected to the input side of the level shift circuit 13.
- the output side of the level shift circuit 13 is connected to the non-inverting input side of the comparator 16.
- the level shift circuit 13 shifts the voltage held in the peak hold circuit 15 in the plus direction by the shift amount ⁇ Vs to generate the threshold voltage Vth and outputs it to the comparator 16.
- the shift amount ⁇ Vs is smaller than 1 ⁇ 2 of the displacement width of the first voltage Va.
- the optical receiving circuit 60 generates the threshold voltage Vth by using the peak hold circuit 15 of the holding circuit 62.
- the conventional optical receiver circuit generates a threshold voltage using a peak detector and an average value detector.
- the optical receiver circuit 60 generates the threshold voltage Vth with fewer circuit components than the conventional optical receiver circuit. Thereby, the optical receiver circuit 60 can reduce the current consumption when generating the threshold voltage Vth as compared with the conventional case.
- the conversion circuit 145 and the comparator 16 are connected via a holding circuit 62 including the level shift circuit 13 and the peak hold circuit 15.
- the optical receiver circuit 60 generates the threshold voltage Vth using the peak hold circuit 15 or the like. Then, the optical receiver circuit 60 outputs the voltage Vo based on the threshold voltage Vth. Therefore, distortion of the output waveform of the comparator 16 is suppressed.
- the example in which the photocurrent Ipd2 flowing through the second light receiver 31 is 1 ⁇ 2 of the photocurrent Ipd1 flowing through the first light receiver 11 has been described.
- the method of making the photocurrent Ipd2 flowing through the second light receiver 31 smaller than the photocurrent Ipd1 flowing through the first light receiver 11 is not limited to these methods.
- the second photodiode 35 of the second light receiver 31 having the same photoelectric conversion efficiency as that of the first photodiode 21 of the first light receiver 11 is used.
- the photoelectric conversion efficiency of the second photodiode of the second light receiver 31 may be lower than that of the first photodiode 21 of the first light receiver 11.
- the photoelectric conversion efficiency of the second photodiode of the second light receiver 31 may be 1 ⁇ 2 that of the first photodiode 21 of the first light receiver 11.
- the photoelectric conversion efficiencies of the second photodiode and the first photodiode 21 are equal, and the incident angle of the optical signal received by the second photodiode is the same as that of the optical signal received by the first photodiode 21. It may be different from the incident angle. At this time, the incident angle of the second photodiode is set so that the light amount of the optical signal received by the second photodiode is 1 ⁇ 2 of the light amount of the optical signal received by the first photodiode 21.
- the displacement of the threshold voltage Vth can be adjusted by making the photocurrent Ipd2 flowing through the second light receiver 31 smaller than the photocurrent Ipd1 flowing through the first light receiver 11. Further, the displacement width of the threshold voltage Vth can be adjusted according to the photocurrent Ipd2. Therefore, as the first TIA 12 and the second TIA 32, TIA having the same conversion efficiency for converting the photocurrent into the voltage can be used.
- an optical receiver circuit in which the conversion efficiency of the second TIA 32 is lower than the conversion efficiency of the first TIA 12 may be used.
- an optical receiver circuit in which the conversion efficiency of the second TIA 32 is 1 ⁇ 2 of the conversion efficiency of the first TIA 12 may be used.
- the conversion efficiency is a conversion efficiency for converting a photocurrent into a voltage. That is, the displacement width of the threshold voltage Vth may be adjusted by adjusting the conversion efficiency of the second TIA 32 and the conversion efficiency of the first TIA 12.
- the first light receiver 11 and the second light receiver 31 may be on the same chip or different chips.
- the components that convert the optical signal provided in the first light receiver 11 and the second light receiver 31 into a photocurrent may be on the same integrated circuit or on different integrated circuits.
- the displacement width A2 of the second voltage Vb is 1 ⁇ 2 of the displacement width A1 of the first voltage Va.
- the displacement width A2 of the second voltage Vb is limited to this. Not.
- the displacement width of the second voltage Vb is smaller than the displacement width of the first voltage Va, the second voltage Vb is larger than the minimum voltage of the signal voltage Vio that is a voltage after the shift of the first voltage Va, and is less than the maximum voltage of the signal voltage Vio. If it is.
- the displacement width of the second voltage Vb in the fifth embodiment is smaller than the displacement width of the first voltage Va
- the shifted voltage of the second voltage Vb is larger than the minimum voltage of the signal voltage Vio
- the maximum of the signal voltage Vio It may be less than the voltage.
- the light shielding unit 37 is installed so as to cover the half of the light receiving area where the second photodiode 36 receives an optical signal.
- the light shielding unit 37 is not limited to this.
- the light shielding unit 37 may be provided so that the light amount of the optical signal received by the second photodiode 36 is smaller than the light amount of the optical signal received by the first photodiode 21. Further, it is preferable that the light shielding portion 37 is provided so that the light amount of the optical signal received by the second photodiode 36 is 1 ⁇ 2 of the light amount of the optical signal received by the first photodiode 21. .
- the light shielding portion 37 may be formed on a surface that receives an optical signal as a wall that shields the optical signal.
- the displacement of the threshold voltage Vth can be adjusted by making the photocurrent Ipd2 flowing through the second light receiver 31 smaller than the photocurrent Ipd1 flowing through the first light receiver 11.
- present invention may be used in combination with the above matters or Embodiments 1 to 5.
- the conversion circuit and the comparator are electrically connected via the peak hold circuit.
- the voltage held by the peak hold circuit is used as the threshold voltage.
- distortion of the output waveform of the comparator can be suppressed with a simple circuit configuration.
- current consumption when generating the threshold voltage can be reduced.
- First light receiver 12 First transimpedance amplifier 13 Level shift circuit 14, 142, 143, 144, 145 Conversion circuit 15 Peak hold circuit 16 Comparator 21 First photo Diode 31 2nd light receiver 32, 33 2nd transimpedance amplifier 35, 36, 38, 39 2nd photodiode 37 Light-shielding part 41 1st amplifier 42 2nd amplifier 45 1st resistance 46 2nd resistance 51 3rd photodiode 61 62 holding circuit Va first voltage Vb second voltage Vio signal voltage Vth threshold voltage
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Abstract
Description
以下、本実施の形態の光受信回路10について、図1から図3を参照しながら説明する。図1は、実施の形態1における光受信回路10の概略ブロック図である。図2は、実施の形態1における光受信回路10の第1電圧Vaと第2電圧Vbとの関係を示す図である。図3は、実施の形態1における光受信回路10の信号電圧Vioと、しきい値電圧Vthと、コンパレータの出力波形(電圧Vo)との関係を示す図である。
光受信回路10は、第1受光器11と、第1トランスインピーダンスアンプ(以後、第1TIAと称する)12と、レベルシフト回路13と、第2受光器31と、第2トランスインピーダンスアンプ(以後、第2TIAと称する)32と、ピークホールド回路15と、コンパレータ16とを備える。
レベルシフト回路13の出力側は、コンパレータ16の反転入力側に接続されている。レベルシフト回路13は、第1電圧Vaを所定のシフト量ΔVsだけマイナス方向にシフトさせ、シフトさせた後の電圧Vio(以後、信号電圧Vioと称する)をコンパレータ16へ出力する。ここで、シフト量ΔVsは、第1電圧Vaの変位幅A1の1/2より小さい。また、第1電圧Vaの変位幅A1は、図2に示すように、第1電圧Vaの最小電圧Viと、第1電圧Vaの最大電圧Vamaxとの間の範囲(変位幅)である。そして、図3に示すように、信号電圧Vioの変位幅は、第1電圧Vaの変位幅A1と等しい。信号電圧Vioは、第1電圧Vaをシフト量ΔVsだけマイナス側にシフトした値(Vio=Va-ΔVs)である。
上述したように、光電流Ipd2は光電流Ipd1の1/2であり、第2TIA32の変換効率と第1TIA12の変換効率とは等しい。そのため、式(1)および式(2)から、第2電圧Vbの変位幅A2は、第1電圧Vaの変位幅A1の1/2となる。ここで、第2電圧Vbの変位幅A2は、図2に示すように、第2電圧Vbの最小電圧Viと、第2電圧Vbの最大電圧Vbmaxとの間の範囲(変位幅)である。
以下、本実施の形態の光受信回路10の動作について、図1から図3を参照しながら説明する。
以上説明したように、本実施の形態の光受信回路10では、ピークホールド回路15を用いて、しきい値電圧Vthを生成している。一方、従来の光受信回路は、ピーク検出部および平均値検出部を用いて、しきい値電圧を生成している。つまり、光受信回路10は、従来の光受信回路と比較して少ない回路部品で、しきい値電圧Vthの生成を行っている。これにより、光受信回路10は、しきい値電圧Vthを生成する際の消費電流を従来よりも低減できる。
図4は、実施の形態2における光受信回路20の概略ブロック図である。光受信回路20は、第2受光器31が、第2フォトダイオード35とは異なる第2フォトダイオード36と、遮光部37とを備えている点が実施の形態1と相違する。なお、本実施の形態では、実施の形態1と同様の構成要素には同一の符号を付して説明を省略する。
図5は、実施の形態3における光受信回路30の概略ブロック図である。本実施の形態の光受信回路30は、第2受光器31が、第2フォトダイオード35とは異なる第2フォトダイオード38を備えている点が実施の形態1と相違する。さらに、変換回路143が第2TIA32とは異なる第2TIA33を備える点が実施の形態1と相違する。さらに、第1TIA12の構成も実施の形態1と相違する。なお、本実施の形態では、実施の形態1と同様の構成要素には同一の符号を付して説明を省略する。
図6は、実施の形態4における光受信回路40の概略ブロック図である。本実施の形態の光受信回路40は、図6に示すように、第2受光器31が、第2フォトダイオード35とは異なる第2フォトダイオード39を備えている点が実施の形態1と相違する。さらに、第1受光器11が、第1フォトダイオード21と第3フォトダイオード51とを備える点が実施の形態1と相違する。なお、本実施の形態では、実施の形態1と同様の構成要素には同一の符号を付して説明を省略する。
図7は、実施の形態5における光受信回路50の概略ブロック図である。本実施の形態の光受信回路50は、図7に示すように、レベルシフト回路13とピークホールド回路15とからなる保持回路61を備えている点が実施の形態1と相違する。さらに、第1TIA12にレベルシフト回路13が接続されていない点が実施の形態1と相違する。なお、本実施の形態では、実施の形態1と同様の構成要素には同一の符号を付して説明を省略する。
11 第1受光器
12 第1トランスインピーダンスアンプ
13 レベルシフト回路
14,142,143,144,145 変換回路
15 ピークホールド回路
16 コンパレータ
21 第1フォトダイオード
31 第2受光器
32,33 第2トランスインピーダンスアンプ
35,36,38,39 第2フォトダイオード
37 遮光部
41 第1増幅器
42 第2増幅器
45 第1抵抗
46 第2抵抗
51 第3フォトダイオード
61,62 保持回路
Va 第1電圧
Vb 第2電圧
Vio 信号電圧
Vth しきい値電圧
Claims (19)
- 光信号を受信して第1の光電流に変換する第1受光器と、
前記第1受光器に接続され、前記第1の光電流を第1電圧に変換する第1トランスインピーダンスアンプと、
前記第1トランスインピーダンスアンプに接続され、前記第1電圧を低電圧側にシフトさせた信号電圧を生成するレベルシフト回路と、
前記光信号を受信して第2の光電流に変換する第2受光器と、
前記第2受光器に接続され、前記第2の光電流を、前記信号電圧の最小電圧より大きく、前記信号電圧の最大電圧未満の第2電圧に変換する第2トランスインピーダンスアンプと、
前記第2トランスインピーダンスアンプに接続され、前記第2電圧のピーク電圧を第1のしきい値電圧として保持するピークホールド回路と、
前記レベルシフト回路および前記ピークホールド回路に接続され、前記信号電圧と前記第1のしきい値電圧とを比較するコンパレータと、
を備える
光受信回路。 - 前記第2の光電流は、前記第1の光電流よりも少ない
請求項1記載の光受信回路。 - 前記第2受光器の受光面積は、前記第1受光器の受光面積よりも小さい
請求項2に記載の光受信回路。 - 前記第2受光器は遮光部を有しており、
前記遮光部は、前記第2受光器で受光される光量が前記第1受光器で受光される光量より少なくなるように形成されている
請求項2に記載の光受信回路。 - 前記第2受光器の光電変換効率は、前記第1受光器の光電変換効率よりも低い
請求項2に記載の光受信回路。 - 前記第1トランスインピーダンスアンプは、第1増幅器と、前記第1増幅器に並列に接続された第1抵抗を有しており、
前記第2トランスインピーダンスアンプは、第2増幅器と、前記第2増幅器に並列に接続された第2抵抗を有しており、
前記第2抵抗の抵抗値は、前記第1抵抗の抵抗値より低い
請求項1に記載の光受信回路。 - 前記第1受光器は、互いに並列に接続された複数のフォトダイオードを有している
請求項1に記載の光受信回路。 - 前記第2トランスインピーダンスアンプが前記第2の光電流を前記第2電圧に変換する変換効率は、前記第1トランスインピーダンスアンプが前記第1の光電流を前記第1電圧に変換する変換効率よりも低い
請求項1に記載の光受信回路。 - 前記第2電圧の変位幅は、前記第1電圧の変位幅の1/2である
請求項1に記載の光受信回路。 - 光信号を受信して第1の光電流に変換する第1受光器と、
前記第1受光器に接続され、前記第1の光電流を第1電圧に変換する第1トランスインピーダンスアンプと、
前記光信号を受信して第2の光電流に変換する第2受光器と、
前記第2受光器に接続され、前記第2の光電流を、前記第1電圧の最小電圧より大きく、前記第1電圧の最大電圧未満の第2電圧に変換する第2トランスインピーダンスアンプと、
前記第2トランスインピーダンスアンプに接続され、前記第2電圧を高電圧側にシフトさせた電圧のピーク電圧を第2のしきい値電圧として保持する保持回路と、
前記第1トランスインピーダンスアンプおよび前記保持回路に接続され、前記第1電圧と、前記第2のしきい値電圧とを比較するコンパレータと、
を備える
光受信回路。 - 前記保持回路は、レベルシフト回路とピークホールド回路とを有する
請求項10に記載の光受信回路。 - 前記第2の光電流は、前記第1の光電流よりも少ない
請求項10記載の光受信回路。 - 前記第2受光器の受光面積は、前記第1受光器の受光面積よりも小さい
請求項12に記載の光受信回路。 - 前記第2受光器は遮光部を有しており、
前記遮光部は、前記第2受光器で受光される光量が前記第1受光器で受光される光量より少なくなるように形成されている
請求項12に記載の光受信回路。 - 前記第2受光器の光電変換効率は、前記第1受光器の光電変換効率よりも低い
請求項12に記載の光受信回路。 - 前記第1トランスインピーダンスアンプは、第1増幅器と、前記第1増幅器に並列に接続された第1抵抗を有しており、
前記第2トランスインピーダンスアンプは、第2増幅器と、前記第2増幅器に並列に接続された第2抵抗を有しており、
前記第2抵抗の抵抗値は、前記第1抵抗の抵抗値より低い
請求項10に記載の光受信回路。 - 前記第1受光器は、互いに並列に接続された複数のフォトダイオードを有している
請求項10に記載の光受信回路。 - 前記第2トランスインピーダンスアンプが前記第2の光電流を前記第2電圧に変換する変換効率は、前記第1トランスインピーダンスアンプが前記第1の光電流を前記第1電圧に変換する変換効率よりも低い
請求項10に記載の光受信回路。 - 前記第2電圧の変位幅は、前記第1電圧の変位幅の1/2である
請求項10に記載の光受信回路。
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6242649A (ja) * | 1985-08-20 | 1987-02-24 | Sumitomo Electric Ind Ltd | 光受信回路 |
JPS63278382A (ja) * | 1987-05-11 | 1988-11-16 | Mitsubishi Electric Corp | 光受信回路 |
JP2008236392A (ja) * | 2007-03-20 | 2008-10-02 | Toshiba Corp | 光受信回路 |
JP2010028768A (ja) * | 2008-07-24 | 2010-02-04 | Toshiba Corp | 光受信器 |
JP2010178327A (ja) * | 2009-01-05 | 2010-08-12 | Toshiba Corp | 光受信回路及び光結合装置 |
US8023835B2 (en) * | 2007-02-28 | 2011-09-20 | Korea University Industry and Academy Cooperation Foundation | Optical receiver, optical audio apparatus, optical communication apparatus and optical reception method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62285537A (ja) | 1986-06-03 | 1987-12-11 | Sumitomo Electric Ind Ltd | 光受信回路 |
JP3514993B2 (ja) * | 1998-12-10 | 2004-04-05 | 日本オプネクスト株式会社 | 光受信回路及び当該回路を用いた光モジュール |
JP3665635B2 (ja) * | 2002-11-27 | 2005-06-29 | 株式会社東芝 | 光信号受信回路、及び、光信号受信半導体装置 |
JP2007096593A (ja) * | 2005-09-28 | 2007-04-12 | Toshiba Corp | 受信装置 |
JP4568205B2 (ja) * | 2005-10-14 | 2010-10-27 | 株式会社東芝 | 受信装置 |
JP5514142B2 (ja) * | 2011-04-11 | 2014-06-04 | 株式会社東芝 | 受信回路 |
JP2012231272A (ja) * | 2011-04-26 | 2012-11-22 | Toshiba Corp | 受信回路 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6242649A (ja) * | 1985-08-20 | 1987-02-24 | Sumitomo Electric Ind Ltd | 光受信回路 |
JPS63278382A (ja) * | 1987-05-11 | 1988-11-16 | Mitsubishi Electric Corp | 光受信回路 |
US8023835B2 (en) * | 2007-02-28 | 2011-09-20 | Korea University Industry and Academy Cooperation Foundation | Optical receiver, optical audio apparatus, optical communication apparatus and optical reception method |
JP2008236392A (ja) * | 2007-03-20 | 2008-10-02 | Toshiba Corp | 光受信回路 |
JP2010028768A (ja) * | 2008-07-24 | 2010-02-04 | Toshiba Corp | 光受信器 |
JP2010178327A (ja) * | 2009-01-05 | 2010-08-12 | Toshiba Corp | 光受信回路及び光結合装置 |
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