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1. 发明授权

US10326416B2 Amplifier 有权
公开(公告)号：US10326416B2
公开(公告)日：2019-06-18
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 , H03F1/02 , H03F1/34 , H03F3/68 , H03F3/50
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 an anode and a 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. 发明授权

US09577753B2 Transimpedance amplifier 有权
标题翻译：互阻放大器
公开(公告)号：US09577753B2
公开(公告)日：2017-02-21
申请号：US14747465
申请日：2015-06-23
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yoshiyuki Sugimoto
IPC分类号： H03F3/08 , H04B10/079 , H03F1/08 , H03F3/45
CPC分类号： H04B10/0797 , H03F1/083 , H03F3/08 , H03F3/45475 , H03F2200/375 , H03F2200/453 , H03F2200/462 , H03F2203/45288 , H04B10/272 , H04B10/6933
摘要： A TIA comprises a TIA core that converts a current signal to a voltage signal, a single-to-differential converter that generates a differential voltage signal from the voltage signal, a feedback circuit that generates a control signal from the differential voltage signal, a bypass circuit that generates the current signal by subtracting the bypass current from the input current so that an average value of the current signal is maintained at a predetermined value, and a monitor circuit that generates a monitor current proportional to the bypass current from the control signal.
摘要翻译： TIA包括将电流信号转换为电压信号的TIA核心，从电压信号产生差分电压信号的单差分转换器，从差分电压信号产生控制信号的反馈电路，旁路电路，其通过从输入电流中减去旁路电流来产生电流信号，使得电流信号的平均值保持在预定值;以及监视电路，其从控制信号产生与旁路电流成比例的监视电流。

3. 发明授权

US10608599B2 Variable gain circuit and transimpedance amplifier using the same 有权
公开(公告)号：US10608599B2
公开(公告)日：2020-03-31
申请号：US16101102
申请日：2018-08-10
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yoshiyuki Sugimoto , Naoki Itabashi
IPC分类号： H03F3/45 , H03F3/08 , H03G1/00 , H03G3/00 , H03G3/30
摘要： A transimpedance amplifier includes a variable gain circuit configured to generate a pair of complementary signals in accordance with an input signal and a reference signal. A first differential circuit of the variable gain circuit includes a first transistor including a control terminal to receive the input signal, a second transistor including a control terminal to receive the reference signal, and a variable resistance circuit including a first field effect transistor (FET) and a second FET. A first timing when a voltage of a first linearity adjustment signal input to the first FET reaches a first threshold voltage of the first FET and a second timing when a voltage of a second linearity adjustment signal input to the second FET reaches a second threshold voltage of the second FET are different from each other.

4. 发明授权

US08941440B2 Differential circuit compensating gain enhancement due to self heating of transistors 有权
标题翻译：由于晶体管的自身加热，差分电路补偿增益
公开(公告)号：US08941440B2
公开(公告)日：2015-01-27
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 , H03F3/08
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。

5. 发明授权

US11486760B2 Receiving circuit and optical receiving circuit 有权
公开(公告)号：US11486760B2
公开(公告)日：2022-11-01
申请号：US17445334
申请日：2021-08-18
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Seiji Kumagai , Yoshiyuki Sugimoto , Keiji Tanaka
IPC分类号： G01J1/44 , H03F1/56
摘要： A receiving circuit includes a first input terminal and a second input terminal, an input circuit that includes a first node, a second node, a first inductor, a second inductor, a first variable resistive element, and a second variable resistive element. The first variable resistive element is electrically connected between the first node and the second input terminal, and the second variable resistive element is electrically connected between the second node and the first input terminal. The receiving circuit further includes a differential amplifier configured to generate a differential voltage signal in accordance with a differential current signal. The receiving circuit still further includes a control circuit configured to perform detection of an amplitude of the differential voltage signal and change a resistance value of the first variable resistive element and a resistance value of the second variable resistive element based on a result of the detection.

6. 发明授权

US11228293B2 Differential amplifier circuit having stable gain 有权
公开(公告)号：US11228293B2
公开(公告)日：2022-01-18
申请号：US16700360
申请日：2019-12-02
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yoshiyuki Sugimoto , Keiji Tanaka
IPC分类号： H03F1/30 , H03F3/45 , G05F1/573 , H03F3/345 , G05F3/24
摘要： A differential amplifier circuit includes: a control current source supplying a control current; paired bipolar transistors; an a variable resistance circuit including: a series circuit of a first resistor and a second resistor having an identical resistance, the series circuit electrically connected between a first terminal and a second terminal of the variable resistance circuit; a first field effect transistor (FET) having a source and a drain being electrically connected to emitters of the paired bipolar transistors, respectively; and a second FET having a drain, a gate being electrically connected to the drain thereof, the gate of the first FET, and a control terminal of variable resistance circuit, a source being electrically connected to a connection node between the first resistor and the second resistor, wherein the control current source adjusts the control current to allow transconductance of the second FET to be kept constant.

7. 发明授权

US09660601B2 Amplifier with compensation of gain in low frequencies 有权
公开(公告)号：US09660601B2
公开(公告)日：2017-05-23
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 , H03F1/34 , H03F3/213 , H03F1/08
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.

8. 发明授权

US09030257B2 Differential circuit compensated with self-heating effect of active device 有权
标题翻译：差分电路补偿有源器件的自发热效应
公开(公告)号：US09030257B2
公开(公告)日：2015-05-12
申请号：US13688671
申请日：2012-11-29
申请人： Sumitomo Electric Industries, Ltd.
发明人： Naoki Itabashi , Yoshiyuki Sugimoto , Makoto Ito , Keiji Tanaka
IPC分类号： H03F3/45 , H04B10/60
CPC分类号： H04B10/60 , H03F3/45085 , H03F3/45179 , H03F3/45475 , H03F3/45973 , H03F2203/45166
摘要： A differential circuit with a function to compensate unevenness observed in the differential gain thereof is disclosed. The differential circuit provides a low-pass filter in one of the paired transistors not receiving the input signal in addition to another low-pass filter that provides an average of output signals as a reference level of the differential circuit. The cut-off frequency of the filter is preferably set to be equal to the transition frequency at which the self-heating effect explicitly influences the trans-conductance of the transistor.
摘要翻译：公开了一种补偿其差分增益中观察到的不均匀性的差分电路。除了提供输出信号的平均值作为差分电路的参考电平的另一个低通滤波器之外，差分电路在一个未被接收输入信号的成对晶体管之一中提供低通滤波器。滤波器的截止频率优选设定为等于自发热效应显着地影响晶体管的跨导的转变频率。

9. 发明授权

US08766728B2 Trans-impedance amplifier with enhanced dynamic range but invariable input impedance 有权
标题翻译：具有增强动态范围但不变输入阻抗的跨阻放大器
公开(公告)号：US08766728B2
公开(公告)日：2014-07-01
申请号：US13684764
申请日：2012-11-26
申请人： Sumitomo Electric Industries, Ltd.
发明人： Makoto Ito , Yoshiyuki Sugimoto , Keiji Tanaka
IPC分类号： H03F3/08
CPC分类号： H03F3/08
摘要： A trans-impedance amplifier (TIA) for an optical receiver is disclosed, in which the TIA enhances the dynamic range thereof but suppresses the variation of the input impedance thereof. The TIA enhances the dynamic range by subtracting from the photocurrent input therein, which varies the input impedance. The TIA also provides the variable gain amplifier with a feedback resistor. The variable gain of the amplifier compensates the variation of the input impedance due to the current subtraction.
摘要翻译：公开了一种用于光接收器的跨阻放大器（TIA），其中TIA增强其动态范围，但是抑制其输入阻抗的变化。 TIA通过从其中的光电流输入中减去其来改变输入阻抗来增强动态范围。 TIA还为可变增益放大器提供反馈电阻。放大器的可变增益补偿了由于电流减法引起的输入阻抗的变化。

10. 发明授权

US09496826B2 Transimpedance amplifier 有权
标题翻译：互阻放大器
公开(公告)号：US09496826B2
公开(公告)日：2016-11-15
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： H03F1/34 , H03F1/02 , H03F3/08 , H03F1/08 , H03F3/45
CPC分类号： H03F1/0205 , H03F1/083 , H03F3/08 , H03F3/087 , H03F3/45475 , H03F2200/144 , H03F2200/171
摘要： A TIA converts an input current into a output voltage. The TIA includes a feedback circuit that controls a bypass current to be extracted from the input current. The feedback circuit includes: a filter that passes low frequency components of the output voltage; a voltage shifter which includes a current source and converts an output signal of the filter into a first shift signal with a time constant; a voltage shifter which includes a current source, and converts a first threshold reference into a second shift signal with another time constant; a comparator which generates a control signal to control the bypass circuit by comparing the first shift signal with the second shift signal; and a comparator which controls the time constant by comparing the control signal with a second threshold reference.
摘要翻译： TIA将输入电流转换为输出电压。 TIA包括控制从输入电流提取的旁路电流的反馈电路。反馈电路包括：滤波器，其通过输出电压的低频分量; 电压移位器，其包括电流源，并将滤波器的输出信号以时间常数转换为第一移位信号; 电压移位器，其包括电流源，并且将第一阈值参考转换为具有另一时间常数的第二移位信号; 比较器，其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旁路电路的控制信号; 以及比较器，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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