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1. 发明申请

US20180323748A1 Methods of adjusting gain error in instrumentation amplifiers 审中-公开
公开(公告)号：US20180323748A1
公开(公告)日：2018-11-08
申请号：US15887199
申请日：2018-02-02
申请人： Microchip Technology Incorporated
发明人： Serban Motoroiu , Jim Nolan
IPC分类号： H03F1/12 , H03F3/45 , H03F1/34
CPC分类号： H03F1/12 , H03F1/342 , H03F3/45179 , H03F3/45183 , H03F3/45672 , H03F2200/258 , H03F2200/261 , H03F2203/45048 , H03F2203/45138 , H03F2203/45341 , H03F2203/45342 , H03F2203/45466 , H03F2203/45494 , H03F2203/45504 , H03F2203/45511 , H03F2203/45521 , H03G1/0023 , H03G1/0029 , H03G1/0088
摘要： A current feed-back instrumentation amplifier (CFIA) comprises a differential pair with degeneration for amplifying small differential voltages in the presence of large common-mode voltages. The CFIA includes input and feedback transconductors and a trimming circuit that trims the back-bias voltages of the transistors in each transconductor. The trimming circuit includes a plurality of selectable resistors disposed in the signal path of the tail current in each transconductor. Each of the plurality of selectable resistors has a switch coupled to it. When a switch is closed, only the resistors up to the respective switch are in the signal path of the bulk-to-source voltage of the differentially paired transistors. The resistor trimming circuit reduces the mismatch between transconductances of the respective differential pair transistors, in turn reducing mismatch of the overall transconductances of the transconductors, and thereby reducing the CFIA's gain error.

2. 发明申请

US20170338782A1 Method And System For A Feedback Transimpedance Amplifier With Sub-40KHZ Low-Frequency Cutoff 审中-公开
公开(公告)号：US20170338782A1
公开(公告)日：2017-11-23
申请号：US15660571
申请日：2017-07-26
申请人： Luxtera, Inc.
发明人： Brian Welch
IPC分类号： H03F3/45 , H03F3/08 , G01J1/44 , H03F1/34
CPC分类号： H03F3/45237 , G01J1/44 , H03F1/34 , H03F3/087 , H03F3/45071 , H03F3/45076 , H03F3/45475 , H03F3/45968 , H03F2200/405 , H03F2203/45222 , H03F2203/45288 , H03F2203/45511 , H03F2203/45526
摘要： A system for a differential trans-impedance amplifier circuit comprising: an amplifier having a pair of input nodes and configured to generate an amplified replica of a differential voltage on said pair of input nodes; a photodiode; a pair of DC-blocking capacitors coupling said photodiode to said pair of input nodes; at least one resistance coupled between said pair of input nodes of said amplifier; and a bias network comprising two identical photodiode biasing resistances each photodiode biasing resistance coupled in series between said photodiode and a respective DC voltage. A feedback loop for the amplifier may include source followers that are operable to level shift voltages prior to coupling capacitors that couple said photodiode to said amplifier to ensure stable bias conditions for said amplifier. The source followers may include CMOS transistors. The amplifier may be integrated in a complementary metal-oxide semiconductor (CMOS) chip, which may include a CMOS photonics chip.

3. 发明申请

US20160254793A1 CLOCK AND DATA DRIVERS WITH ENHANCED TRANSCONDUCTANCE AND SUPPRESSED OUTPUT COMMON-MODE 审中-公开
标题翻译：具有增强的交叉和抑制输出通用模式的时钟和数据驱动器
公开(公告)号：US20160254793A1
公开(公告)日：2016-09-01
申请号：US15029777
申请日：2014-11-05
申请人： Wenjun SU , Guangming YIN , Quanqing ZHU , QUALCOMM INCORPORATED
发明人： Wenjun SU , Guangming YIN , Quanqing ZHU
IPC分类号： H03F3/45 , H03K5/12
CPC分类号： H03F3/45762 , H03F1/0277 , H03F3/211 , H03F3/45183 , H03F3/45609 , H03F3/72 , H03F2200/555 , H03F2200/72 , H03F2203/45288 , H03F2203/45301 , H03F2203/45511 , H03F2203/45638 , H03F2203/45644 , H03F2203/45702 , H03K5/12
摘要： Methods, apparatus, and means for maintaining a low output common-mode voltage in a driver are provided. One example apparatus includes a first differential amplifier stage configured to provide a differential output for the apparatus; and a second differential amplifier stage configured to drive the first differential amplifier stage, the second differential amplifier stage including a pair of pre-driver amplifiers, a pair of n-stage circuits, and an input skew averaging circuit, wherein each of the pair of n-stage units is split into two half blocks. The input skew averaging circuit is configured to suppress the output common-mode voltage by driving the blocks with complementary digital inputs to average out a skew in a gate-to-source voltage of the pair of n-stage circuits. For certain aspects, two feed-forward capacitors may be added to enhance the transconductance and operating speed of main transistors of the first differential amplifier stage.
摘要翻译：提供了用于在驱动器中维持低输出共模电压的方法，装置和装置。一个示例性设备包括：第一差分放大器级，被配置为提供用于该设备的差分输出; 以及第二差分放大器级，被配置为驱动所述第一差分放大器级，所述第二差分放大器级包括一对预驱动器放大器，一对n级电路和输入偏差平均电路，其中， n级单元分为两个半块。输入偏斜平均电路被配置为通过用互补数字输入驱动块来抑制输出共模电压，以平均一对n级电路的栅极至源极电压的偏移。对于某些方面，可以添加两个前馈电容器以增强第一差分放大器级的主晶体管的跨导和工作速度。

4. 发明授权

US09431977B2 Method and system for a feedback transimpedance amplifier with sub-40khz low-frequency cutoff 有权
标题翻译：具有低于40khz低频截止频率的反馈跨阻放大器的方法和系统
公开(公告)号：US09431977B2
公开(公告)日：2016-08-30
申请号：US14305733
申请日：2014-06-16
申请人： Luxtera, Inc.
发明人： Brian Welch
IPC分类号： H03F3/45 , H03F1/34 , H03F3/08 , G01J1/44
CPC分类号： H03F3/45237 , G01J1/44 , H03F1/34 , H03F3/087 , H03F3/45071 , H03F3/45076 , H03F3/45475 , H03F3/45968 , H03F2200/405 , H03F2203/45222 , H03F2203/45288 , H03F2203/45511 , H03F2203/45526
摘要： A system for a feedback amplifier with sub-40 khz low-frequency cutoff is disclosed and may include amplifying electrical signals received via coupling capacitors utilizing an amplifier having feedback paths comprising source followers and feedback resistors. Gate terminals of the source followers may be coupled to output terminals of the amplifier circuit. The feedback paths may be coupled prior to the coupling capacitors at inputs of the amplifier circuit. Voltages may be level shifted prior to the coupling capacitors to ensure stable bias conditions for the amplifier circuit. The amplifier circuit may be integrated in a CMOS photonics chip with the source followers comprising CMOS transistors. The amplifier circuit may receive current-mode logic or voltage signals. The electrical signals may be received from a photodetector, which may comprise a silicon germanium photodiode differentially coupled to the amplifier circuit. Optical signals for the photodetector in the chip may be received via optical fibers.
摘要翻译：公开了一种具有次40khz低频截止的反馈放大器的系统，并且可以包括利用具有包括源跟随器和反馈电阻器的反馈路径的放大器放大经由耦合电容器接收的电信号。源极跟随器的栅极端子可以耦合到放大器电路的输出端子。反馈路径可以在放大器电路的输入端处的耦合电容器之前被耦合。在耦合电容器之前，电压可能会发生电平偏移，以确保放大器电路的稳定偏置条件。放大器电路可以集成在具有CMOS晶体管的源极跟随器的CMOS光子芯片中。放大器电路可以接收电流模式逻辑或电压信号。电信号可以从光电检测器接收，光电检测器可以包括差分耦合到放大器电路的硅锗光电二极管。可以通过光纤接收芯片中的光电检测器的光信号。

5. 发明申请

US20150279467A1 AMPLIFIER STAGE 有权
标题翻译：放大器级
公开(公告)号：US20150279467A1
公开(公告)日：2015-10-01
申请号：US14640236
申请日：2015-03-06
申请人： STMICROELECTRONICS S.r.I.
发明人： Antonino CONTE , Maria Giaquinta
IPC分类号： G11C16/04 , H03F3/16 , G11C16/26 , H03K3/012 , G11C16/10 , H03F1/02 , H03K3/353
CPC分类号： G11C16/0408 , G11C16/10 , G11C16/12 , G11C16/26 , G11C29/021 , G11C29/028 , H03F1/0205 , H03F1/086 , H03F1/14 , H03F3/16 , H03F3/45183 , H03F3/45475 , H03F2200/129 , H03F2200/153 , H03F2200/45 , H03F2200/516 , H03F2203/45138 , H03F2203/45364 , H03F2203/45511 , H03F2203/45512 , H03K3/012 , H03K3/353
摘要： An input signal is amplified into an output signal that is to be applied to an electrical load including a capacitive component. An amplifier stage includes a pre-amplifier module to receive a first supply voltage, and an output module to receive a second supply voltage. The pre-amplifier module includes a first gain block to pre-amplify the input signal into a first pre-amplified signal, and a second gain block to pre-amplify the input signal into a second pre-amplified signal. A feedback block feeds back the output signal as a feedback signal. A combination element combines the first pre-amplified signal and the feedback signal into a combined signal. The output module combines the combined signal and the second pre-amplified signal into the output signal.
摘要翻译：输入信号被放大为要施加到包括电容分量的电负载的输出信号。放大器级包括用于接收第一电源电压的前置放大器模块和用于接收第二电源电压的输出模块。前置放大器模块包括用于将输入信号预放大成第一预放大信号的第一增益模块和将输入信号预放大成第二预放大信号的第二增益模块。反馈块反馈输出信号作为反馈信号。组合元件将第一预放大信号和反馈信号组合成组合信号。输出模块将组合信号和第二预放大信号组合成输出信号。

6. 发明申请

US20150084688A1 BASEBAND PROCESSING CIRCUITRY 有权
标题翻译：基带处理电路
公开(公告)号：US20150084688A1
公开(公告)日：2015-03-26
申请号：US14037116
申请日：2013-09-25
申请人： QUALCOMM Incorporated
发明人： Li-Chung Chang , Bindu Gupta , Timothy Donald Gathman , Ibrahim Ramez Chamas
IPC分类号： H03H11/04
CPC分类号： H03H11/0466 , H03F1/0277 , H03F1/08 , H03F1/223 , H03F3/193 , H03F3/45183 , H03F3/45475 , H03F3/45932 , H03F3/72 , H03F2200/06 , H03F2200/09 , H03F2200/165 , H03F2200/168 , H03F2200/171 , H03F2200/294 , H03F2200/336 , H03F2200/411 , H03F2200/429 , H03F2200/432 , H03F2200/534 , H03F2200/541 , H03F2200/543 , H03F2203/45352 , H03F2203/45396 , H03F2203/45506 , H03F2203/45511 , H03F2203/45512 , H03F2203/45516 , H03F2203/45521 , H03F2203/45522 , H03F2203/45526 , H03F2203/45528 , H03F2203/45594 , H03F2203/45618 , H03F2203/45702 , H03F2203/45728 , H03F2203/7215 , H03F2203/7221 , H03F2203/7236 , H03H2210/021 , H03H2250/00
摘要： Techniques for designing baseband processing circuitry for radio IC's. In an aspect, techniques for differential-to-single-ended conversion in a baseband portion of the IC are disclosed to reduce the pin count and package size for RF IC's. In another aspect, the converter includes selectable narrowband and wideband amplifiers, wherein the wideband amplifiers may be implemented using transistor devices having smaller area than corresponding transistor devices of narrowband amplifiers. Further techniques for bypassing one or more elements, and for implementing a low-pass filter of the converter using an R-C filter network, are described.
摘要翻译：无线电IC基带处理电路设计技术。在一方面，公开了用于IC的基带部分中的差分到单端转换的技术，以减少RF IC的引脚数和封装尺寸。在另一方面，转换器包括可选择的窄带和宽带放大器，其中宽带放大器可以使用具有比窄带放大器的相应晶体管器件小的面积的晶体管器件来实现。描述了用于绕过一个或多个元件以及用于使用R-C滤波器网络来实现转换器的低通滤波器的进一步的技术。

7. 发明申请

US20150048882A1 APPARATUS AND METHOD FOR TESTING OF SUCCESSFUL OPERATION OF TRANSIMPEDANCE AMPLIFIERS 有权
标题翻译：测试放大放大器成功运行的装置和方法
公开(公告)号：US20150048882A1
公开(公告)日：2015-02-19
申请号：US13970320
申请日：2013-08-19
申请人： Texas Instruments Deutschland GmbH
发明人： Ulrich Schacht , Oliver Piepenstock
IPC分类号： G01R31/26 , H03F3/45
CPC分类号： H03F3/45071 , H03F3/087 , H03F3/45475 , H03F3/45973 , H03F2200/462 , H03F2203/45212 , H03F2203/45511 , H03F2203/45521 , H03F2203/45528 , H03F2203/45536
摘要： The present disclosure relates to an apparatus comprising at least two operational amplifiers, a first and a second current input, at least one voltage output, and at least two resistors, wherein a first current source is connectable to the first current input, and a test current source is connectable to the second current input, and wherein the first current input is connected to an inverting input of the first operational amplifier and the second current input is connected to an inverting input of the second operational amplifier, and a first feedback resistor is connected between the output and the inverting input of the first operational amplifier and a second feedback resistor is connected between the output and the inverting input of the second operational amplifier, and wherein the voltage output is connected to the outputs of the first and the second operational amplifier.
摘要翻译：本公开涉及一种包括至少两个运算放大器，第一和第二电流输入，至少一个电压输出和至少两个电阻器的装置，其中第一电流源可连接到第一电流输入端，以及测试电流源可连接到第二电流输入，并且其中第一电流输入连接到第一运算放大器的反相输入，第二电流输入连接到第二运算放大器的反相输入，第一反馈电阻是连接在第一运算放大器的输出和反相输入端之间，第二反馈电阻连接在第二运算放大器的输出和反相输入端之间，其中电压输出连接到第一和第二运算放大器的输出端放大器

8. 发明申请

US20140300417A1 AMPLIFIERS WITH BOOSTED OR DEBOOSTED SOURCE DEGENERATION INDUCTANCE 有权
标题翻译：具有升压或去离子源变差电感的放大器
公开(公告)号：US20140300417A1
公开(公告)日：2014-10-09
申请号：US13857031
申请日：2013-04-04
申请人： QUALCOMM INCORPORATED
发明人： Rui Xu , Li-Chung Chang
IPC分类号： H03F1/34
CPC分类号： H03F1/342 , H03F1/223 , H03F3/193 , H03F3/245 , H03F3/45179 , H03F3/68 , H03F3/72 , H03F2200/111 , H03F2200/121 , H03F2200/156 , H03F2200/159 , H03F2200/492 , H03F2200/541 , H03F2203/45302 , H03F2203/45318 , H03F2203/45332 , H03F2203/45386 , H03F2203/45394 , H03F2203/45511 , H03F2203/45534 , H03F2203/7209
摘要： Amplifiers with boosted or deboosted source degeneration inductance are disclosed. In an exemplary design, an apparatus includes an amplifier circuit and a feedback circuit. The amplifier circuit receives an input signal and provides an output signal and includes a source degeneration inductor. The feedback circuit is coupled between a node of the amplifier circuit and the source degeneration inductor. The feedback circuit provides feedback to vary an input impedance of an amplifier including the amplifier circuit and the feedback circuit. The feedback circuit may be programmable and may be enabled to provide feedback or disabled to provide no feedback. Alternatively, the feedback circuit may always be enabled to provide feedback. In either case, the feedback circuit may have a variable gain to provide a variable input impedance for the amplifier.
摘要翻译：公开了具有升压或去激发的源极退化电感的放大器。在示例性设计中，装置包括放大器电路和反馈电路。放大器电路接收输入信号并提供输出信号并包括源极退化电感器。反馈电路耦合在放大器电路的节点和源极退化电感之间。反馈电路提供反馈以改变包括放大器电路和反馈电路的放大器的输入阻抗。反馈电路可以是可编程的并且可以被启用以提供反馈或禁用以提供无反馈。或者，反馈电路可以总是能够提供反馈。在任一情况下，反馈电路可以具有可变增益以为放大器提供可变输入阻抗。

9. 发明授权

US08571504B2 Receiver 有权
标题翻译：接收器
公开(公告)号：US08571504B2
公开(公告)日：2013-10-29
申请号：US13433618
申请日：2012-03-29
申请人： Sebastien Robert , Walter Jaudard
发明人： Sebastien Robert , Walter Jaudard
IPC分类号： H04B1/16
CPC分类号： H04B1/10 , H03F1/34 , H03F3/191 , H03F3/45085 , H03F3/50 , H03F2200/138 , H03F2200/294 , H03F2203/45511
摘要： A receiver (400; 500) comprising an amplifier (406; 506) having an input (408) and an output (410). The input (408) of the amplifier is configured to receive a signal. The receiver also comprises a feedback path (412; 512) between the output (410) and the input (408) of the amplifier (406; 506), wherein the feedback path (412; 512) includes a filter (402; 502) and a buffer amplifier (414; 514) in series. The input of the buffer amplifier (414; 514) is connected to the output (410; 510) of the amplifier (406; 506). The output of the buffer amplifier (414; 514) is connected to the input of the filter (402; 502). The output of the filter (402; 502) is connected to the input (408; 508) of the amplifier (406; 506). The filter (402; 502) is configured to pass signals having a desired frequency.
摘要翻译：一种包括具有输入（408）和输出（410）的放大器（406; 506）的接收器（400; 500）。放大器的输入（408）被配置为接收信号。接收机还包括在放大器（406; 506）的输出（410）和输入（408）之间的反馈路径（412; 512），其中反馈路径（412; 512）包括滤波器（402; 502）和串联的缓冲放大器（414; 514）。缓冲放大器（414; 514）的输入端连接到放大器（406; 506）的输出端（410; 510）。缓冲放大器（414; 514）的输出端连接到滤波器（402; 502）的输入端。滤波器（402; 502）的输出端连接到放大器（406; 506）的输入端（408; 508）。滤波器（402; 502）被配置为传递具有期望频率的信号。

10. 发明授权

US08471639B2 Method and system for a feedback transimpedance amplifier with sub-40khz low-frequency cutoff 有权
标题翻译：具有低于40khz低频截止频率的反馈跨阻放大器的方法和系统
公开(公告)号：US08471639B2
公开(公告)日：2013-06-25
申请号：US13175545
申请日：2011-07-01
申请人： Brian Welch
发明人： Brian Welch
IPC分类号： H03F3/08
CPC分类号： H03F3/45237 , G01J1/44 , H03F1/34 , H03F3/087 , H03F3/45071 , H03F3/45076 , H03F3/45475 , H03F3/45968 , H03F2200/405 , H03F2203/45222 , H03F2203/45288 , H03F2203/45511 , H03F2203/45526
摘要： A system for a feedback transimpedance amplifier with sub-40 khz low-frequency cutoff is disclosed and may include amplifying electrical signals received via coupling capacitors utilizing a transimpedance amplifier (TIA) having feedback paths comprising source followers and feedback resistors. The feedback paths may be coupled prior to the coupling capacitors at inputs of the TIA. Voltages may be level shifted prior to the coupling capacitors to ensure stable bias conditions for the TIA. The TIA may be integrated in a CMOS chip and the source followers may comprise CMOS transistors. The TIA may receive current-mode logic or voltage signals. The electrical signals may be received from a photodetector, which may comprise a silicon germanium photodiode and may be differentially coupled to the TIA. The chip may comprise a CMOS photonics chip where optical signals for the photodetector in the CMOS photonics chip may be received via one or more optical fibers.
摘要翻译：公开了一种具有低于40khz低频截止的反馈跨阻放大器的系统，并且可以包括利用具有包括源极跟随器和反馈电阻器的反馈路径的跨阻抗放大器（TIA）放大经由耦合电容器接收的电信号。反馈路径可以在TIA输入端处的耦合电容器之前耦合。在耦合电容器之前，电压可能会发生电平偏移，以确保TIA稳定的偏置条件。 TIA可以集成在CMOS芯片中，源极跟随器可以包括CMOS晶体管。 TIA可以接收电流模式逻辑或电压信号。电信号可以从光电检测器接收，光电检测器可以包括硅锗光电二极管，并且可以与TIA差分耦合。芯片可以包括CMOS光子芯片，其中可以经由一个或多个光纤接收CMOS光子芯片中的光电检测器的光信号。

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