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1. 发明申请

US20180316323A1 AMPLIFIER 审中-公开
公开(公告)号：US20180316323A1
公开(公告)日：2018-11-01
申请号：US15964776
申请日：2018-04-27
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yoshiyuki SUGIMOTO
IPC分类号： H03F3/45 , H03F3/68 , H03F1/02 , H03F1/34
CPC分类号： H03F3/45085 , H03F1/0233 , H03F1/34 , H03F3/45094 , H03F3/45475 , H03F3/45529 , H03F3/50 , H03F3/68 , H03F2200/126 , H03F2200/153 , H03F2200/165 , H03F2200/21 , H03F2200/234 , H03F2200/267 , H03F2200/303 , H03F2200/93 , H03F2203/45021 , H03F2203/45022 , H03F2203/45026 , H03F2203/45146 , H03F2203/45151 , H03F2203/45154 , H03F2203/45156 , H03F2203/45418 , H03F2203/45548 , H03F2203/45556 , H03F2203/45571 , H03F2203/45578 , H03F2203/45592 , H03F2203/45596 , H03F2203/45671 , H03F2203/5033
摘要： An amplifier that amplifies a differential signal includes first and second input terminals for receiving two input signals; first and second diodes each including anode and cathode, the anodes being electrically connected to the first and second input terminals; first and second bias current sources being respectively electrically connected to the cathodes of the first and second diodes; an operational amplifier connected to the cathode of the first diode and the cathode of the second diode and configured to amplify a differential signal between signals generated at the cathodes of the first and second diodes; a capacitive element being electrically connected between an input and an output of the operational amplifier; and a differential amplifier provided between the operational amplifier and the first and second input terminals and configured to amplify the two input signals. The first and second bias current sources include a current mirror circuit.

2. 发明申请

US20160329869A1 AMPLIFIER WITH COMPENSATION OF GAIN IN LOW FREQUENCIES 有权
标题翻译：具有低频增益补偿的放大器
公开(公告)号：US20160329869A1
公开(公告)日：2016-11-10
申请号：US15136644
申请日：2016-04-22
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Keiji TANAKA , Yoshiyuki SUGIMOTO
IPC分类号： H03F3/45 , H03F3/213 , H03F1/34
CPC分类号： H03F3/45085 , H03F1/083 , H03F1/34 , H03F3/213 , H03F2200/153 , H03F2200/24 , H03F2203/45022 , H03F2203/45026 , H03F2203/45288
摘要： An amplifier includes a differential amplifier and a compensator. A differential amplifier includes a current source and paired transistors. The paired transistors generate an output signal by dividing a source current supplied by the current source into emitter currents of the paired transistors in response to a difference between an input signal and a reference signal. A compensator includes an amplifying transistor and a feedback circuit that feeds a collector current output from a collector of the amplifying transistor back to a base of the amplifying transistor therethrough. The compensator generates the reference signal at a base of the amplifying transistor. The compensator decreases power consumption of the amplifying transistor when the collector current increases, and increases the power consumption of the amplifying transistor when the collector current decreases. The compensator suppresses a peaking of gain in a low frequency band.
摘要翻译：放大器包括差分放大器和补偿器。差分放大器包括电流源和成对晶体管。成对晶体管响应于输入信号和参考信号之间的差异，将由电流源提供的源电流分成成对晶体管的发射极电流而产生输出信号。补偿器包括放大晶体管和反馈电路，其将从放大晶体管的集电极输出的集电极电流馈送到放大晶体管的基极。补偿器在放大晶体管的基极处产生参考信号。当集电极电流增加时，补偿器降低放大晶体管的功耗，并且当集电极电流降低时增加放大晶体管的功耗。补偿器抑制低频带增益的峰值。

3. 发明申请

US20130082776A1 AMPLIFIER FOR RECEIVING OPTICAL SIGNALS COMPLEMENTARY TO EACH OTHER 有权
标题翻译：用于接收每个其他光学信号的放大器
公开(公告)号：US20130082776A1
公开(公告)日：2013-04-04
申请号：US13631232
申请日：2012-09-28
申请人： Sumitomo Electric Industries, Ltd.
发明人： Yoshiyuki SUGIMOTO
IPC分类号： H03F3/45 , H03G3/30
CPC分类号： H03F3/45968 , H03F1/083 , H03F3/087 , H03F3/45 , H03F3/45085 , H03F2200/375 , H03F2203/45138 , H03F2203/45212 , H03G3/3084
摘要： An amplifier for detecting photocurrents complementary to each other is disclosed. The optical receiver includes two trans-impedance amplifiers (TIAs) each having the single phase arrangement, a level detector to detect an average level between respective outputs of the TIAs, a controller to detect a difference between each of the output of the TIA, and an offset canceller to bypass each of the photocurrents to compensate the output offset between two TIAs depending on the average level and the difference between two levels.
摘要翻译：公开了一种用于检测彼此互补的光电流的放大器。光接收器包括每个具有单相布置的两个跨阻放大器（TIA），用于检测TIA的相应输出之间的平均电平的电平检测器，用于检测TIA的每个输出之间的差异的控制器和偏移消除器绕过每个光电流，以补偿两个TIA之间的输出偏移，取决于平均电平和两个电平之间的差。

4. 发明申请

US20210167863A1 RECEIVING CIRCUIT AND OPTICAL RECEIVER 有权
公开(公告)号：US20210167863A1
公开(公告)日：2021-06-03
申请号：US17103092
申请日：2020-11-24
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yoshiyuki SUGIMOTO , Seiji KUMAGAI
IPC分类号： H04B10/61 , H03F3/08
摘要： The first and second input terminals are configured to receive first and second current signal respectively. The first FET has a first current terminal electrically connected to the first input terminal, a second current terminal electrically connected to the second input terminal, and a first control terminal receiving a first control signal. The first TIA circuit has a first input node which is electrically connected to the first current terminal. The first TIA circuit converts a current signal received at the first input node to the first voltage signal. The second TIA circuit has a second input node which is electrically connected to the second current terminal. The second TIA circuit converts a current signal received at the second input node to the second voltage signal. The control circuit generates the first control signal in accordance with a difference between the first and second voltage signals.

5. 发明申请

US20210159858A1 TRANSIMPEDANCE AMPLIFIER CIRCUIT 有权
公开(公告)号：US20210159858A1
公开(公告)日：2021-05-27
申请号：US17097348
申请日：2020-11-13
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yoshiyuki SUGIMOTO , Keiji TANAKA , Seiji KUMAGAI
IPC分类号： H03F1/42 , H03F3/45
摘要： A transimpedance amplifier circuit for generating an output voltage in accordance with an input current includes an offset resistor, a common emitter inverting amplifier having a first input and a first output, the first input receiving the input current, an emitter follower having a second input and a second output, the second input being coupled to the first output through the offset resistor, the second output outputting the output voltage, a feedback resistor connected between the second output and the first input, a variable current source connected to a node between the offset resistor and the second input, the variable current source configured to provide an offset current to the offset resistor, the offset current having a current value varied in accordance with a control signal, and a control circuit configured to generate the control signal so that an average voltage of the first output approaches a preset voltage value.

6. 发明申请

US20130229231A1 DIFFERENTIAL CIRCUIT COMPENSATING GAIN ENHANCEMENT DUE TO SELF HEATING OF TRANSISTORS 有权
标题翻译：由于晶体管的自发加热导致的差分电路增益增益
公开(公告)号：US20130229231A1
公开(公告)日：2013-09-05
申请号：US13778320
申请日：2013-02-27
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Keiji TANAKA , Akihiro MOTO , Yoshiyuki SUGIMOTO
IPC分类号： H03F3/45
CPC分类号： H03F3/4508 , H03F3/087 , H03F3/45085 , H03F3/45475 , H03F3/45556 , H03F2200/447 , H03F2203/45008 , H03F2203/45078
摘要： A differential circuit with a function to compensate the gain enhancement due to the self-heating of the transistor is disclosed. The differential circuit includes an equalizer unit coupled with one of paired transistors. The other of the paired transistor receives the input signal to be amplified. The base level, or the base-emitter bias, is oppositely modulated by the input signal through the common emitter, which causes the modification of the base current. The equalizer unit reduces the variation of the base level only in low frequencies where the self-heating effect of the transistor appears.
摘要翻译：公开了一种具有补偿由于晶体管的自加热引起的增益增强的功能的差分电路。差分电路包括与成对晶体管中的一个耦合的均衡器单元。配对晶体管中的另一个接收要放大的输入信号。基极电平或基极 - 发射极偏压通过共同发射极的输入信号相反调制，这导致基极电流的修改。均衡器单元仅在晶体管的自发热效应出现的低频下降低基极电平的变化。

7. 发明申请

US20230092750A1 RECEPTION CIRCUIT FOR OPTICAL COMMUNICATION 有权
公开(公告)号：US20230092750A1
公开(公告)日：2023-03-23
申请号：US17932743
申请日：2022-09-16
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yoshiyuki SUGIMOTO , Keiji TANAKA
IPC分类号： H03F1/08 , H03F3/45 , H03G3/30 , H04B10/60
摘要： A reception circuit includes an input terminal configured to receive an input current; a voltage signal circuit being configured to convert a current signal into a voltage signal; a reference voltage circuit configured to generate a reference voltage in accordance with a first feedback current; a differential amplifier circuit configured to generate a differential signal in accordance with a voltage difference between the voltage signal and the reference voltage; and an offset control circuit configured to generate the first feedback current and a second feedback current, adjust the first feedback current when the voltage signal has an average voltage value greater than the reference voltage, and subtract the second feedback current from the input current such that the offset of the differential signal falls within the tolerance when the voltage signal has an average voltage value smaller than the reference voltage.

8. 发明申请

US20220352857A1 TRANSIMPEDANCE AMPLIFIER CIRCUIT 有权
公开(公告)号：US20220352857A1
公开(公告)日：2022-11-03
申请号：US17660476
申请日：2022-04-25
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yoshiyuki SUGIMOTO
IPC分类号： H03F3/45 , H03G3/30
摘要： A transimpedance amplifier circuit includes an amplifier circuit that converts a current signal into a voltage signal with a gain being varied based on a control signal and a gain control circuit that generates the control signal based on an amplitude of the voltage signal. The gain control circuit includes a detection circuit that generates an amplitude-detection-signal in accordance with the amplitude of the voltage signal, a setting circuit that generates an amplitude-reference-signal, a differential voltage generation circuit that generates a differential-voltage-signal obtained by offsetting a voltage difference between the amplitude-detection-signal and the amplitude-reference-signal based on an amplitude-setting-signal, an operational transconductance amplifier (OTA) that generates a differential-current-signal based on the differential-voltage-signal, and a variable capacitor circuit having a variable capacitance being varied based on the amplitude-setting-signal, and configured to be charged/discharged by the differential-current-signal and output a charging voltage. The control signal is generated based on the charging voltage.

9. 发明申请

US20170163352A1 TRANS-IMPEDANCE AMPLIFIER AND OPTICAL RECEIVER INCLUDING THE SAME 有权
公开(公告)号：US20170163352A1
公开(公告)日：2017-06-08
申请号：US15356159
申请日：2016-11-18
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yoshiyuki SUGIMOTO , Taizo TATSUMI
IPC分类号： H04B10/69 , H03F1/02 , H03F3/08
CPC分类号： H04B10/691 , H03F1/0233 , H03F3/08 , H03F3/085 , H03F3/087 , H03F2200/435 , H03F2200/471 , H04B10/272 , H04B10/693
摘要： A TIA converts a current signal received at its terminal to a voltage signal. The TIA includes an amplifier that includes an input node connected to the terminal and that converts a current signal received at the input node to a voltage signal; a first diode whose cathode is connected to the terminal; a second diode whose anode is connected to the terminal; a first current source connected to an anode of the first diode, the first current source supplying a first forward current to the first diode; a second current source connected to a cathode of the second diode, the second current source supplying a second forward current to the second diode; and a controller that controls forward currents respectively generated by the first current source and the second current source in accordance with an increase and decrease in the voltage signal.

10. 发明申请

US20150270808A1 TRANSIMPEDANCE AMPLIFIER 有权
标题翻译：转移放大器
公开(公告)号：US20150270808A1
公开(公告)日：2015-09-24
申请号：US14663385
申请日：2015-03-19
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yoshiyuki SUGIMOTO
IPC分类号： H03F1/02 , H03F3/08
CPC分类号： H03F1/0205 , H03F1/083 , H03F3/08 , H03F3/087 , H03F3/45475 , H03F2200/144 , H03F2200/171
摘要： A TIA 1 converts an input current into a output voltage. The TIA 1 is comprising a feedback circuit 14 that controls a bypass current to be extracted from the input current. The feedback circuit 14 includes: a filter 18 that generates low frequency components of the output voltage; a voltage shifter 19 which includes a current source IS1, and converts an output signal of the filter 18 into a first shift signal with a time constant; a voltage shifter 20 which includes a current source IS2, and converts a first threshold reference into a second shift signal with another time constant comparator 21 which generates a control signal to control the bypass circuit 13 by comparing the first shift signal with the second shift signal; and a comparator 22 which controls the time constant by comparing the control signal with a second threshold reference.
摘要翻译： TIA 1将输入电流转换为输出电压。 TIA1包括控制从输入电流提取的旁路电流的反馈电路14。反馈电路14包括：产生输出电压的低频分量的滤波器18; 电压移位器19，其包括电流源IS1，并且将滤波器18的输出信号转换为具有时间常数的第一移位信号; 包括电流源IS2的电压移位器20，并且用另一个时间常数比较器21将第一阈值参考值转换为第二移位信号，该时间常数比较器21通过将第一移位信号与第二移位信号进行比较来产生控制信号以控制旁路电路13 ; 以及比较器22，其通过将控制信号与第二阈值参考进行比较来控制时间常数。

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