专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

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

US20230011340A1 RECEIVER CIRCUIT FOR OPTICAL COMMUNICATION 有权
公开(公告)号：US20230011340A1
公开(公告)日：2023-01-12
申请号：US17852736
申请日：2022-06-29
申请人： Sumitomo Electric Industries, Ltd.
发明人： Seiji KUMAGAI , Yoshiyuki SUGIMOTO , Keiji TANAKA
IPC分类号： H04B10/60
摘要： A receiver circuit includes an input terminal for receiving an input current signal, a transimpedance amplifier having an input node, the transimpedance amplifier converting a current signal input to the input node into a voltage signal, an inductor having a first terminal and a second terminal, and a bypass circuit. The first terminal is coupled to the input terminal and the second terminal is coupled to the input node. The bypass circuit includes a bias circuit supplying a bias voltage, a first variable resistor coupled between the first terminal and the bias circuit, a second variable resistor coupled between the second terminal and the bias circuit, and an impedance adjustment circuit including a resistor and a capacitor connected in parallel to the resistor, the impedance adjustment circuit connected in series to at least one of the first variable resistor and the second variable resistor.

8. 发明申请

US20220057262A1 RECEIVING CIRCUIT AND OPTICAL RECEIVING CIRCUIT 有权
公开(公告)号：US20220057262A1
公开(公告)日：2022-02-24
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.

9. 发明申请

US20200177143A1 DIFFERENTIAL AMPLIFIER CIRCUIT HAVING STABLE GAIN 审中-公开
公开(公告)号：US20200177143A1
公开(公告)日：2020-06-04
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： H03F3/45 , H03F1/30 , G05F1/573
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.

10. 发明申请

US20130142522A1 DIFFERENTIAL CIRCUIT COMPENSATED WITH SELF-HEATING EFFECT OF ACTIVE DEVICE 有权
标题翻译：补偿主动装置自加热效应的差动电路
公开(公告)号：US20130142522A1
公开(公告)日：2013-06-06
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： H04B10/60 , H03F3/45
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。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式