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11. 发明申请

WO2012173112A1 増幅器および信号処理装置审中-公开
标题翻译：放大器和信号处理装置
公开(公告)号：WO2012173112A1
公开(公告)日：2012-12-20
申请号：PCT/JP2012/065006
申请日：2012-06-12
申请人：三菱電機株式会社 , 加賀野未来 , 真壁和也 , 尾込智和 , 中西隆仁 , 美濃部正 , 伊藤俊
发明人：加賀野　未来 , 真壁　和也 , 尾込　智和 , 中西　隆仁 , 美濃部　正 , 伊藤　俊
IPC分类号： H03F3/34 , G01R33/09 , H03F1/30 , H03F1/34
CPC分类号： H03F3/45 , G01D5/145 , G01R33/09 , H03F3/45179 , H03F3/45475 , H03F2200/411 , H03F2200/78 , H03F2203/45512 , H03F2203/45514 , H03F2203/45521 , H03F2203/45528 , H03F2203/45534 , H03F2203/45536 , H03F2203/45594 , H03F2203/45728
摘要：　スイッチ（ＳＷ１）がオフ、スイッチ（ＳＷ２）がオンに設定されている場合は、ＳｉｇＯｕｔ端子（２０５）の電圧が基準電圧で安定し、コンデンサ（Ｃ１）にはバイアス電圧が印加される。スイッチ（ＳＷ２）がオンからオフに変わることで、コンデンサ（Ｃ１）に保持されているバイアス電圧により、ＳｉｇＩｎ端子（２０１）から入力された検出信号が、基準電圧を基準にして増幅され、増幅信号がＳｉｇＯｕｔ端子（２０５）から出力される。
摘要翻译：当开关（SW1）被设置为关闭并且开关（SW2）被设置为导通时，SigOut端子（205）的电压被参考电压稳定，并且偏置电压被施加到电容器（C1）。将开关（SW2）从导通状态切换到关闭状态，将偏置电压保持在电容器（C1）中，通过SigIn端子（201）输入的检测信号以参考电压为基准放大，放大信号从SigOut端子（205）输出。

12. 发明申请

WO2012102880A1 APPARATUS AND METHOD FOR AMPLIFICATION WITH HIGH FRONT-END GAIN IN THE PRESENCE OF LARGE DC OFFSETS 审中-公开
标题翻译：在大直流偏差存在下具有高前端增益放大的装置和方法
公开(公告)号：WO2012102880A1
公开(公告)日：2012-08-02
申请号：PCT/US2012/021331
申请日：2012-01-13
申请人： ANALOG DEVICES, INC.
发明人： ALEXANDER, Alasdair, Gordon , PLOURDE, David , DUFF, Matthew
IPC分类号： H03F3/45
CPC分类号： H03F3/45977 , H03F3/45475 , H03F3/45973 , H03F2200/261 , H03F2200/375 , H03F2200/513 , H03F2200/78 , H03F2203/45511 , H03F2203/45512 , H03F2203/45516 , H03F2203/45521 , H03F2203/45526 , H03F2203/45528 , H03F2203/45536
摘要： Apparatus and methods reduce the likelihood of amplifier saturation due to propagated DC offsets, and reduce the recover from saturated stated when such saturation occurs. Advantageously, these attributes are beneficial for monitoring of bioelectric signals. A circuit uses an instrumentation amplifier connected as a high pass filter to attenuate large DC offsets and amplify small signals. The circuit can include an instrumentation amplifier electrically coupled with a first feedback circuit including at least one resistor and a second feedback circuit including an op-amp. The feedback circuit can also include a low-pass filter. The op-amp in the second feedback circuit can be configured as a non-inverting amplifier, an inverting amplifier, and/or an integrator circuit. Alternatively, the circuit can include an instrumentation amplifier with one feedback circuit including at least one resistor, and a coupling capacitor electrically coupled with a reference voltage.
摘要翻译：装置和方法降低了由于传播的DC偏移引起的放大器饱和的可能性，并且当发生这种饱和时，减少了从饱和的恢复。有利的是，这些属性对生物电信号的监测是有益的。电路使用连接作为高通滤波器的仪表放大器来衰减大直流偏移并放大小信号。电路可以包括与包括至少一个电阻器的第一反馈电路电耦合的仪表放大器和包括运算放大器的第二反馈电路。反馈电路还可以包括低通滤波器。第二反馈电路中的运算放大器可以被配置为非反相放大器，反相放大器和/或积分器电路。或者，电路可以包括具有一个反馈电路的仪表放大器，该反馈电路包括至少一个电阻器，以及与参考电压电耦合的耦合电容器。

13. 发明申请

WO2007104050A3 MAGNETORESISTIVE HEAD PREAMPLIFIER CIRCUIT WITH PROGRAMMABLE INPUT IMPEDANCE 审中-公开
标题翻译：具有可编程输入阻抗的磁阻式前置放大器电路
公开(公告)号：WO2007104050A3
公开(公告)日：2008-05-08
申请号：PCT/US2007063692
申请日：2007-03-09
申请人： TEXAS INSTRUMENTS INC , DEAN DOUGLAS W
发明人： DEAN DOUGLAS W
IPC分类号： G11B5/02
CPC分类号： H03F3/45085 , G11B5/09 , G11B2005/0018 , H03F1/56 , H03F2200/471 , H03F2203/45366 , H03F2203/45512 , H03F2203/45521 , H03F2203/45702 , H03F2203/45722
摘要： A preamplifier circuit (32) for a disk drive system is disclosed. The preamplifier circuit has first and second inputs that sense the voltage on either side of a magnetoresistive (MR) head element, which presents a varying resistance according to the localized magnetic field at a nearby disk surface. The preamplifier circuit includes a programmable input impedance circuit, which presents an impedance in parallel to feedback impedance at each of the first and second inputs. The parallel impedance presented by the programmable input impedance circuit is controlled by controlling a current source in the programmable input impedance circuit; a higher current results in a lower input impedance.
摘要翻译：公开了一种用于盘驱动系统的前置放大器电路（32）。前置放大器电路具有感测磁阻（MR）磁头元件的任一侧的电压的第一和第二输入，其根据附近磁盘表面处的局部磁场呈现变化的电阻。前置放大器电路包括可编程输入阻抗电路，其在第一和第二输入中的每一个处呈现与反馈阻抗并联的阻抗。可编程输入阻抗电路提供的并联阻抗通过控制可编程输入阻抗电路中的电流源来控制; 较高的电流导致较低的输入阻抗。

14. 发明申请

WO2007104050A2 MAGNETORESISTIVE HEAD PREAMPLIFIER CIRCUIT WITH PROGRAMMABLE INPUT IMPEDANCE 审中-公开
标题翻译：具有可编程输入阻抗的磁阻式前置放大器电路
公开(公告)号：WO2007104050A2
公开(公告)日：2007-09-13
申请号：PCT/US2007/063692
申请日：2007-03-09
申请人： TEXAS INSTRUMENTS INCORPORATED , DEAN, Douglas, W.
发明人： DEAN, Douglas, W.
IPC分类号： G11B5/02 , G11B5/09
CPC分类号： H03F3/45085 , G11B5/09 , G11B2005/0018 , H03F1/56 , H03F2200/471 , H03F2203/45366 , H03F2203/45512 , H03F2203/45521 , H03F2203/45702 , H03F2203/45722
摘要： A preamplifier circuit (32) for a disk drive system is disclosed. The preamplifier circuit has first and second inputs that sense the voltage on either side of a magnetoresistive (MR) head element, which presents a varying resistance according to the localized magnetic field at a nearby disk surface. The preamplifier circuit includes a programmable input impedance circuit, which presents an impedance in parallel to feedback impedance at each of the first and second inputs. The parallel impedance presented by the programmable input impedance circuit is controlled by controlling a current source in the programmable input impedance circuit; a higher current results in a lower input impedance.
摘要翻译：公开了一种用于盘驱动系统的前置放大器电路（32）。前置放大器电路具有感测磁阻（MR）磁头元件的任一侧的电压的第一和第二输入，其根据附近磁盘表面处的局部磁场呈现变化的电阻。前置放大器电路包括可编程输入阻抗电路，其在第一和第二输入中的每一个处呈现与反馈阻抗并联的阻抗。可编程输入阻抗电路提供的并联阻抗通过控制可编程输入阻抗电路中的电流源来控制; 较高的电流导致较低的输入阻抗。

15. 发明申请

WO2017019303A1 HIGH LINEARITY STRUCTURE FOR AMPLIFIER 审中-公开
标题翻译：放大器的高线性结构
公开(公告)号：WO2017019303A1
公开(公告)日：2017-02-02
申请号：PCT/US2016/042111
申请日：2016-07-13
申请人： QUALCOMM INCORPORATED
发明人： YANG, Chien-Chung , DHANASEKARAN, Vijayakumar
IPC分类号： H03F1/30 , H03F1/32 , H03F3/187 , H03F3/21 , H03F3/213 , H03F3/45 , H03F3/50 , H03F3/72 , H03F1/02
CPC分类号： H03F1/0205 , H03F1/0277 , H03F1/305 , H03F1/3205 , H03F3/185 , H03F3/187 , H03F3/211 , H03F3/213 , H03F3/2171 , H03F3/45475 , H03F3/505 , H03F3/72 , H03F2200/03 , H03F2200/129 , H03F2200/151 , H03F2200/156 , H03F2200/159 , H03F2200/18 , H03F2200/294 , H03F2200/411 , H03F2200/414 , H03F2200/417 , H03F2200/69 , H03F2203/21106 , H03F2203/45114 , H03F2203/45138 , H03F2203/45151 , H03F2203/45224 , H03F2203/45521 , H03F2203/45528 , H03F2203/45536 , H03F2203/45594 , H03F2203/45601 , H03F2203/45694 , H03F2203/45698 , H03F2203/45702 , H03F2203/45718 , H03F2203/7221 , H03F2203/7236
摘要： An apparatus includes an input amplifier stage and a switch that has a first terminal at a virtual ground input of the input amplifier stage.
摘要翻译：一种装置包括输入放大器级和在输入放大级的虚拟接地输入端具有第一端的开关。

16. 发明申请

WO2012158431A1 CURRENT BUFFER 审中-公开
标题翻译：当前缓冲区
公开(公告)号：WO2012158431A1
公开(公告)日：2012-11-22
申请号：PCT/US2012/037134
申请日：2012-05-09
申请人： QUALCOMM INCORPORATED , KIM, Namsoo , BURKE, Joseph Patrick
发明人： KIM, Namsoo , BURKE, Joseph Patrick
IPC分类号： H03F1/22 , H03F3/45
CPC分类号： H03F3/45659 , H03F3/45179 , H03F2203/45306 , H03F2203/45521 , H03F2203/45612
摘要： A current filtering current buffer amplifier includes: a first port and a second input port configured to be coupled to and receive input current; a first output port and a second output port configured to be coupled to and provide current to a load; a buffer configured to transfer the received input current to the first and second output ports as an output current, the buffer having an input impedance and an output impedance where the output impedance is higher than the input impedance, the buffer including first and second amplifiers, the first amplifier being a common mode feedback amplifier; and a filter coupled to the first and second input ports and coupled to the first and second amplifiers, the filter having a complex impedance and being configured to notch filter the received input current.
摘要翻译：电流滤波电流缓冲放大器包括：第一端口和第二输入端口，被配置为耦合到并接收输入电流; 第一输出端口和第二输出端口，被配置为耦合到负载并且向负载提供电流; 缓冲器，被配置为将接收到的输入电流传送到第一和第二输出端口作为输出电流，该缓冲器具有输入阻抗和输出阻抗，其中输出阻抗高于输入阻抗，该缓冲器包括第一和第二放大器，第一放大器是共模反馈放大器; 以及耦合到所述第一和第二输入端口并耦合到所述第一和第二放大器的滤波器，所述滤波器具有复阻抗并被配置为陷波滤波所接收的输入电流。

17. 发明申请

WO2010138515A2 DYNAMIC CONTOURED-SOUND/SUBWOOFER-SYNTHESIS AUDIO SYSTEM 审中-公开
标题翻译：动态轮廓音/合成声音系统
公开(公告)号：WO2010138515A2
公开(公告)日：2010-12-02
申请号：PCT/US2010/036083
申请日：2010-05-25
申请人： BERG, Paul G.
发明人： BERG, Paul G.
IPC分类号： H03F99/00
CPC分类号： H03F1/34 , H03F3/187 , H03F2200/03 , H03F2200/165 , H03F2203/45138 , H03F2203/45521 , H03F2203/45526
摘要： A dynamic contoured-sound/subwoofer-synthesis system including an adjustable high pass filter coupled to the input terminal, the high pass filter being designed to provide a variety of frequency response shapes in response to adjustments thereof. A primary amplifier is coupled to receive one of the variety of frequency response shapes from the adjustable high pass filter and includes a main operational amplifier (op-amp) with the inverting input coupled to the adjustable high pass filter through a series connected input capacitor and input resistor. The primary amplifier provides low frequency signal gain and shaping of the received frequency response shape. A high frequency signal shaping circuit includes a feedback op-amp coupled to the inverting input of the main op-amp through a feedback resistor and a feedback capacitor.
摘要翻译：包括耦合到输入端的可调节高通滤波器的动态波形声/重低音扬声器合成系统，所述高通滤波器被设计成响应于其调节而提供各种频率响应形状。主放大器被耦合以从可调高通滤波器接收各种频率响应形状之一，并且包括主运算放大器（运算放大器），反相输入端通过串联连接的输入电容耦合到可调高通滤波器，输入电阻。主放大器提供低频信号增益和接收频率响应形状的整形。高频信号整形电路包括通过反馈电阻器和反馈电容器耦合到主运算放大器的反相输入的反馈运算放大器。

18. 发明申请

WO2009035665A1 IMPROVED LOW POWER, LOW NOISE AMPLIFIER SYSTEM 审中-公开
标题翻译：改进的低功耗低噪声放大器系统
公开(公告)号：WO2009035665A1
公开(公告)日：2009-03-19
申请号：PCT/US2008/010665
申请日：2008-09-12
申请人： ANALOG DEVICES, INC. , LYDEN, Colin, G. , BIRK, Christian, S. , TANSLEY, Tomas
发明人： LYDEN, Colin, G. , BIRK, Christian, S. , TANSLEY, Tomas
IPC分类号： H03F1/00
CPC分类号： H03F3/387 , H03F3/45475 , H03F2200/294 , H03F2203/45134 , H03F2203/45521 , H03F2203/45526
摘要： A low power, low noise amplifier system includes at least one amplifier having first and second differential input terminals, first and second differential output terminals and providing a differential output; first and second input capacitors interconnected with the first and second differential amplifier input terminals; first and second feedback circuits containing first and second feedback capacitors, respectively, interconnected with the amplifier differential input and output terminals; an input chopper switch circuit for receiving a low frequency differential input and selectively, alternately swapping those low frequency differential inputs through the input capacitors to the differential input terminals of the amplifier; an output chopper switch for receiving and selectively, alternately swapping the amplifier differential outputs synchronously with the input chopper switch circuit; and a low pass filter responsive to the swapped differential outputs for providing a low noise, low power amplification of the low frequency differential inputs.
摘要翻译：低功率低噪声放大器系统包括至少一个具有第一和第二差分输入端的放大器，第一和第二差分输出端并提供差分输出; 与第一和第二差分放大器输入端互连的第一和第二输入电容器; 分别包含与放大器差分输入和输出端互连的第一和第二反馈电容器的第一和第二反馈电路; 输入斩波器开关电路，用于接收低频差分输入并选择性地交替地将那些通过输入电容器的低频差分输入交换到放大器的差分输入端; 输出斩波开关，用于接收并选择性地与输入斩波开关电路同步地交替地交换放大器差分输出; 以及响应于交换的差分输出的低通滤波器，用于提供低频差分输入的低噪声，低功率放大。

19. 发明申请

WO2006020612B1 TRANSIMPEDANCE AMPLIFIER WITH INTEGRATED FILTERING AND REDUCED PARASITIC CAPACITANCE 审中-公开
标题翻译：具有集成滤波和降低PARASIIC电容的转移放大器
公开(公告)号：WO2006020612B1
公开(公告)日：2006-04-13
申请号：PCT/US2005028220
申请日：2005-08-09
申请人： FINISAR CORP , DENOYER GILLES P
发明人： DENOYER GILLES P
IPC分类号： H04B10/06
CPC分类号： H03F1/08 , H03F1/26 , H03F1/30 , H03F3/087 , H03F3/45475 , H03F2200/372 , H03F2203/45521
摘要： A transimpedance amplifier (TIA) with integrated filtering. A capacitance is integrated into the TIA and connected to the power supply and to an internal ground of the TIA. Noise on the power supply of the transimpedance amplifier is filtered by the capacitor such that the power supply noise is reduced. The integrated capacitor also reduces noise ground. The integrated capacitor also reduces the effects of common mode noise that may be received from another circuit.
摘要翻译：具有集成滤波功能的跨阻放大器（TIA）。电容集成到TIA中，并连接到电源和TIA的内部地。跨阻放大器的电源上的噪声被电容器滤波，使得电源噪声减小。集成电容器还可减少噪声接地。集成电容器还减少了可能从另一电路接收的共模噪声的影响。

20. 发明申请

WO2005029711A2 SINGLE-ENDED INPUT, DIFFERENTIAL OUTPUT LOW NOISE AMPLIFIER 审中-公开
标题翻译：单端输入，差分输出低噪声放大器
公开(公告)号：WO2005029711A2
公开(公告)日：2005-03-31
申请号：PCT/US2004/030291
申请日：2004-09-14
申请人： ANALOG DEVICES, INC. , GILBERT, Barrie , WEIGANDT, Todd, C.
发明人： GILBERT, Barrie , WEIGANDT, Todd, C.
IPC分类号： H04B
CPC分类号： H03F3/45098 , H03F1/26 , H03F1/3211 , H03F3/45094 , H03F3/45278 , H03F3/45475 , H03F3/45484 , H03F3/45928 , H03F2200/211 , H03F2200/261 , H03F2200/294 , H03F2200/372 , H03F2203/45138 , H03F2203/45288 , H03F2203/45366 , H03F2203/45506 , H03F2203/45521 , H03F2203/45552 , H03F2203/45684 , H03F2203/45686 , H03G1/0023 , H03G1/0088
摘要： An amplifier has an input terminal to receive an input signal. The amplifier includes a first gain stage comprising a pair of input transistors and a second gain stage to drive an output stage. The output stage provides inverting and non-inverting differential output signals on inverting and non-inverting output nodes. The amplifier may also include a feedback signal electrically connected between the inverting and non-inverting output nodes to emitters of the input transistors through a resistor network.
摘要翻译：放大器具有用于接收输入信号的输入端子。放大器包括第一增益级，其包括一对输入晶体管和用于驱动输出级的第二增益级。输出级在反相和非反相输出节点上提供反相和非反相差分输出信号。放大器还可以包括通过电阻网络电连接在反相和非反相输出节点与输入晶体管的发射极之间的反馈信号。

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