专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明公开

US20240214077A1 RECEIVER CIRCUIT AND OPTICAL RECEIVER CIRCUIT 审中-公开
公开(公告)号：US20240214077A1
公开(公告)日：2024-06-27
申请号：US18545182
申请日：2023-12-19
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yoshiyuki SUGIMOTO , Keiji TANAKA
IPC分类号： H04B10/69 , H03F3/26 , H03F3/45
CPC分类号： H04B10/6911 , H03F3/265 , H03F3/45636
摘要： A receiver circuit includes: a constant current circuit to generate second paired current signals according to first paired current signals; a current splitter circuit to output third differential signals having amplitudes smaller than the second paired current signals, from a first and second output nodes; first and second load resistor elements connected between a DC voltage node and the first and second output nodes, respectively; a differential transimpedance amplifier circuit to output paired voltage signals according to the third paired current signals, from first and second output terminals; and a voltage regulator circuit to adjust a gate voltage of an FET connected between a power supply wire and the DC voltage node, so as to reduce at least a difference in respective average potentials of the first and second output nodes and the first and second output terminals.

12. 发明公开

US20240195370A1 RECEIVER CIRCUIT AND OPTICAL RECEIVER CIRCUIT 审中-公开
公开(公告)号：US20240195370A1
公开(公告)日：2024-06-13
申请号：US18527880
申请日：2023-12-04
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Seiji KUMAGAI , Yoshiyuki SUGIMOTO , Keiji TANAKA
IPC分类号： H03F3/45 , H03G3/30
CPC分类号： H03F3/45085 , H03F3/45174 , H03F3/456 , H03G3/30 , H03F2203/45116
摘要： A receiver circuit includes: a constant current circuit to generate second paired current signals according to first paired current signals; a current splitter circuit to output third paired current signals generated from the second paired current signals, from a first output node and a second output node; and a differential TIA circuit to output paired voltage signals from a first output terminal and a second output terminal, according to the third paired current signals input from a third input node and a fourth input node. The differential TIA circuit includes a first feedback resistor element connected between the third input node and the second output terminal, and a second feedback resistor element connected between the fourth input node and the first output terminal. Average voltages of the first and second output nodes and the first and second output terminals are set to be equivalent to each other.

13. 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.

14. 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.

15. 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.

16. 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。

17. 发明公开

US20240275350A1 VARIABLE GAIN AMPLIFIER CIRCUIT 审中-公开
公开(公告)号：US20240275350A1
公开(公告)日：2024-08-15
申请号：US18433906
申请日：2024-02-06
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yoshiyuki SUGIMOTO , Keiji TANAKA , Hiroshi UEMURA
IPC分类号： H03G3/30 , H03F3/45
CPC分类号： H03G3/30 , H03F3/45282 , H03G2201/103
摘要： A variable gain amplifier circuit includes a main circuit including a differential current circuit, a current divider circuit connected to a high potential side of the differential current circuit, and a load circuit connected to a high potential side of the current divider circuit, the main circuit being configured to generate differential output voltage signals by the load circuit in accordance with either differential input voltage signals or first differential current signals; and a gain adjustment circuit configured to adjust a gain of the main circuit. The gain adjustment circuit includes a generation circuit configured to generate a first control voltage and a second control voltage in accordance with a setting signal, and a limit circuit configured to limit, by detecting an amplitude of the differential output voltage signals, the voltage difference to a limit value or greater so that the amplitude does not become lower than a setting voltage.

18. 发明申请

US20200007087A1 TRANSIMPEDANCE AMPLIFIER 审中-公开
公开(公告)号：US20200007087A1
公开(公告)日：2020-01-02
申请号：US16451890
申请日：2019-06-25
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yoshiyuki SUGIMOTO
IPC分类号： H03F1/08 , H03F3/68 , H03F3/45 , H03G3/30
摘要： A variable resistance element is connected between a first input terminal of a first amplifier and a second input terminal of a second amplifier, and has a resistance value between the first input terminal and the second input terminal that is varied according to an amplitude value of a first voltage signal or an amplitude value or a differential voltage signal. A variable current source is connected between the first input terminal and a ground, and controls a current value of a current flowing to the ground from the first input terminal according to a value of an offset of the differential voltage signal. A bias voltage having the same value as that of a bias voltage that is applied to the first input terminal is applied to the second input terminal.

19. 发明申请

US20190052236A1 VARIABLE GAIN CIRCUIT AND TRANSIMPEDANCE AMPLIFIER USING THE SAME 审中-公开
公开(公告)号：US20190052236A1
公开(公告)日：2019-02-14
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： H03F3/08 , H03G3/00 , H03G1/00
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.

20. 发明申请

US20140145789A1 AMPLIFIER 有权
标题翻译：放大器
公开(公告)号：US20140145789A1
公开(公告)日：2014-05-29
申请号：US14091094
申请日：2013-11-26
申请人： Sumitomo Electric Industries, Ltd.
发明人： Yoshiyuki SUGIMOTO
IPC分类号： H03F3/45
CPC分类号： H03F3/087 , H03F3/4508 , H03F3/456 , H03F2203/45306 , H03F2203/45521
摘要： An amplifier includes a first input terminal, a second input terminal, a TIA, and a compensation circuit. The TIA includes a first transistor, a second transistor, a first current source connected to the first input terminal and an emitter of the first transistor, a second current source connected to the second input terminal and an emitter of the second transistor, a first load resistor connected to a collector of the first transistor, and a second load resistor connected to a collector of the second transistor. A bias voltage is supplied to bases of the first and second transistors, the compensation circuit adjusts a first load current and a second load current based on voltage signals, and the TIA outputs the voltage signals based on collector voltages of the first and second transistors.
摘要翻译：放大器包括第一输入端，第二输入端，TIA和补偿电路。 TIA包括第一晶体管，第二晶体管，连接到第一输入端的第一电流源和第一晶体管的发射极，连接到第二输入端的第二电流源和第二晶体管的发射极，第一负载连接到第一晶体管的集电极的电阻器和连接到第二晶体管的集电极的第二负载电阻器。偏置电压被提供给第一和第二晶体管的基极，补偿电路基于电压信号调整第一负载电流和第二负载电流，并且TIA基于第一和第二晶体管的集电极电压输出电压信号。

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