公开(公告)号：US09912310B2

公开(公告)日：2018-03-06

申请号：US15212473

申请日：2016-07-18

申请人： Hamilton Sundstrand Corporation

发明人： James Saloio, Jr. ,  Robert D. Klapatch

IPC分类号： H03F3/45 ,  H03G3/30

CPC分类号： H03F3/45479 ,  H03F3/45955 ,  H03F2200/471 ,  H03F2203/45068 ,  H03F2203/45078 ,  H03F2203/45212 ,  H03G3/30

摘要： A differential signal conditioner circuit with common mode voltage (CMV) compensation is provided. The circuit includes a signal multiplexer that receives a input signal that includes a high and low signal and a reference CMV signal, a differential amplifier coupled to the signal multiplexer that receives the reference CMV signal and outputs a CMV error value during a first cycle, and receives the input signal and outputs an amplified difference signal during a second cycle. The circuit also includes a CMV measurement circuit that receives the reference CMV signal and outputs a confirmation value during the first cycle, and receives the input signal and outputs a CMV compensation value during the second cycle, and a processing element that receives the CMV error value, the amplified difference signal, the CMV compensation value, and a differential amplifier gain value and generates a CMV compensated output based on the received signals and values.

公开(公告)号：US09473092B2

公开(公告)日：2016-10-18

申请号：US14587863

申请日：2014-12-31

申请人： Texas Instruments Incorporated

发明人： Dina Reda El-Damak ,  Rajarshi Mukhopadhyay ,  Jeffrey Anthony Morroni

IPC分类号： H03F3/45

CPC分类号： H03F3/45645 ,  H03F3/3028 ,  H03F3/45206 ,  H03F3/45233 ,  H03F3/45273 ,  H03F3/45771 ,  H03F2203/45002 ,  H03F2203/45048 ,  H03F2203/45078 ,  H03F2203/45116

摘要： An amplifier receives a differential signal and, in response, generates a first negative input current and a first positive input current. In a first operating mode, the amplifier receives a second differential signal, and, in response, generates a second negative input current and a second positive input current. In a second operating mode, the amplifier receives the second differential signal, and, in response, generates a third negative input current and a third positive input current. When the device is operating in the first operating mode, the first negative input current is summed with the second negative input current and the first positive input current is summed with the second positive input current. When the device is operating in the second operating mode, the first negative input current is summed with the third negative input current and the first positive input current is summed with the third positive input current.

摘要翻译： 放大器接收差分信号，作为响应，产生第一负输入电流和第一正输入电流。 在第一操作模式中，放大器接收第二差分信号，并且作为响应，产生第二负输入电流和第二正输入电流。 在第二操作模式中，放大器接收第二差分信号，并且作为响应，产生第三负输入电流和第三正输入电流。 当器件在第一工作模式下工作时，第一个负输入电流与第二个负输入电流相加，第一个正输入电流与第二个正输入电流相加。 当器件在第二工作模式下工作时，第一个负输入电流与第三个负输入电流相加，第一个正输入电流与第三个正输入电流相加。

公开(公告)号：US20150214911A1

公开(公告)日：2015-07-30

申请号：US14166370

申请日：2014-01-28

申请人： Silicon Laboratories Inc.

发明人： Michael S. Johnson ,  Russell Croman

IPC分类号： H03F3/45 ,  H03F1/56

CPC分类号： H03F1/56 ,  H03F3/45941 ,  H03F3/45977 ,  H03F3/45995 ,  H03F2203/45048 ,  H03F2203/45078 ,  H03F2203/45082 ,  H03F2203/45171 ,  H03F2203/45522 ,  H03F2203/45538 ,  H03F2203/45576 ,  H03F2203/45591 ,  H03F2203/45616

摘要： Circuitry and methods are disclosed that may employ common mode calibration circuitry configured to at least partially calibrate out impedance differences or mismatches between the differential signal paths of differential signal circuitry. The common mode calibration circuitry may be integrated as an internal part of integrated differential signal circuitry that includes a differential amplifier to reject common mode noise, and may be used to reduce or substantially eliminate any external and/or internal difference in signal path resistance that exists between the differential signal paths of the integrated differential signal circuitry. A common mode calibration signal may be internally or externally applied to the signal inputs of differential signal circuitry, and used to determine a setting for the common mode calibration circuitry that at least partially calibrates out impedance differences or mismatches between the differential signal paths of differential signal circuitry.

摘要翻译： 公开了可以采用共模校准电路的电路和方法，其配置为至少部分地校准差分信号电路的差分信号路径之间的阻抗差或失配。 共模校准电路可以集成为集成差分信号电路的内部部分，其包括用于抑制共模噪声的差分放大器，并且可以用于减少或基本消除存在的信号路径电阻中的任何外部和/或内部差异 在集成差分信号电路的差分信号路径之间。 共模校准信号可以在内部或外部施加到差分信号电路的信号输入端，并且用于确定共模校准电路的设置，其至少部分地校准差分信号的差分信号路径之间的阻抗差或失配 电路。

公开(公告)号：US08229382B2

公开(公告)日：2012-07-24

申请号：US12355649

申请日：2009-01-16

申请人： Pui-In Mak ,  Seng-Pan U ,  Rui P. Martins

发明人： Pui-In Mak ,  Seng-Pan U ,  Rui P. Martins

IPC分类号： H04B1/06

CPC分类号： H03F3/45475 ,  H03F3/3022 ,  H03F3/45183 ,  H03F3/45928 ,  H03F2203/45078 ,  H03F2203/45082 ,  H03F2203/45424 ,  H03F2203/45528 ,  H03F2203/45534 ,  H03G1/0088 ,  H03G1/04 ,  H03G3/001

摘要： A switched current resistor (SCR) PGA for constant-bandwidth gain control includes an inverting amplifier, a feedback resistor forming a feedback loop between an output side and an input side of the inverting amplifier, and a switched current resistor (SCR) array connected in parallel to the feedback resistor, and configured to tune a gain range between a maximum and a minimum. The SCR array includes a plurality of switched resistors, each comprising a switch in series with a resistor. When the plurality of switched resistors are switched by a gain-control logic, a plurality of switched current sources and a plurality of grounded resistors are switched correspondingly to deliver a transient current, an equivalent of which flows through the plurality of grounded resistors out from the input side of the inverting amplifier, leading to a feedback factor of the PGA being constant.

摘要翻译： 用于恒定带宽增益控制的开关电流电阻（SCR）PGA包括反相放大器，形成反相放大器的输出侧和输入侧之间的反馈环路的反馈电阻器，以及连接在开关电流电阻器 平行于反馈电阻，并且被配置为调节最大和最小之间的增益范围。 SCR阵列包括多个开关电阻器，每个开关电阻器包含与电阻器串联的开关。 当通过增益控制逻辑切换多个开关电阻器时，相应地切换多个开关电流源和多个接地电阻器，以提供瞬时电流，其瞬态电流流过多个接地电阻器 反相放大器的输入侧，导致PGA的反馈因数恒定。

公开(公告)号：US20120139638A1

公开(公告)日：2012-06-07

申请号：US13310609

申请日：2011-12-02

申请人： Kambiz Kaviani ,  Amir Amirkhany ,  Aliazam Abbasfar

发明人： Kambiz Kaviani ,  Amir Amirkhany ,  Aliazam Abbasfar

IPC分类号： H03F3/04

CPC分类号： H03F3/45183 ,  H03F3/45197 ,  H03F3/45632 ,  H03F2200/447 ,  H03F2203/45008 ,  H03F2203/45048 ,  H03F2203/45078 ,  H03F2203/45306 ,  H03F2203/45488 ,  H03F2203/45686 ,  H03G1/0029 ,  H03G1/007

摘要： A receiver includes an amplifier and a transconductance bias circuit. The amplifier gain is largely determined by transconductance and load impedance. The transconductance bias circuit varies the transconductance in inverse proportion to the load impedance to maintain the gain over process, voltage, and temperature. Differential amplifiers can use separate transconductance bias circuits for each amplifier leg, and the bias circuits can be independently controlled to minimize common-mode gain and voltage offsets.

摘要翻译： 接收器包括放大器和跨导偏置电路。 放大器增益主要取决于跨导和负载阻抗。 跨导偏置电路会将跨导与负载阻抗成反比变化，以保持增益超过过程，电压和温度。 差分放大器可以为每个放大器支路使用单独的跨导偏置电路，并且可以独立控制偏置电路以最小化共模增益和电压偏移。

公开(公告)号：US07852157B2

公开(公告)日：2010-12-14

申请号：US12379586

申请日：2009-02-25

申请人： Tachio Yuasa

发明人： Tachio Yuasa

IPC分类号： H03F3/45

CPC分类号： H03F3/45192 ,  H03F3/3022 ,  H03F3/45632 ,  H03F2203/45076 ,  H03F2203/45078 ,  H03F2203/45366 ,  H03F2203/45648

摘要： A differential amplifier includes a differential amplifier section to generate a current composed of a differential-mode current and a first common-mode current according to a differential-mode component and a common-mode component of an input signal, a common-mode current generator section to generate a common-mode current according to the common-mode component of the input signal, and a current amplifier section to receive the current and the common-mode current, amplify a difference between the current and the common-mode current and output a result.

摘要翻译： 差分放大器包括差分放大器部分，用于根据差分模式分量和输入信号的共模分量产生由差模电流和第一共模电流组成的电流，共模电流发生器 部分，以根据输入信号的共模分量产生共模电流，以及电流放大器部分，用于接收电流和共模电流，放大电流和共模电流之间的差，并输出 结果。

公开(公告)号：US20070285166A1

公开(公告)日：2007-12-13

申请号：US11467170

申请日：2006-08-25

申请人： Tim K. SHIA ,  Chi-Chen Chung ,  Long-Xi Chang

发明人： Tim K. SHIA ,  Chi-Chen Chung ,  Long-Xi Chang

IPC分类号： H03F3/45

CPC分类号： H03F3/45475 ,  G11C7/062 ,  H03F1/34 ,  H03F3/393 ,  H03F3/45928 ,  H03F2200/213 ,  H03F2200/264 ,  H03F2203/45078 ,  H03F2203/45101 ,  H03F2203/45134 ,  H03F2203/45138 ,  H03F2203/45424 ,  H03F2203/45512 ,  H03F2203/45586 ,  H03F2203/45588

摘要： A fully differential sensing apparatus and an input common mode feedback circuit are provided. The input common mode feedback circuit includes a common mode error amplifier and a plurality of adaptive conductance elements. Each adaptive conductance element behaves with a low impedance characteristic when its anode voltage is greater than its cathode voltage by a positive threshold voltage or, on the contrary, when the anode voltage of such an adaptive conductance element is lower than its cathode voltage by a negative threshold voltage, the adaptive element also behaves with a low impedance characteristic; otherwise the aforementioned adaptive conductance element behaves with a high impedance characteristic. The common mode error amplifier and a plurality of such adaptive conductance elements form a negative feedback loop to effectively maintain the input common voltage of a fully differential input amplifier, which can be used for a fully differential sensing apparatus.

摘要翻译： 提供全差分感测装置和输入共模反馈电路。 输入共模反馈电路包括共模误差放大器和多个自适应电导元件。 当其阳极电压大于其阴极电压的正阈值电压时，每个自适应电导元件都具有低阻抗特性，或者相反，当这种自适应电导元件的阳极电压低于其阴极电压为负 阈值电压，自适应元件也具有低阻抗特性; 否则上述自适应电导元件具有高阻抗特性。 共模误差放大器和多个这样的自适应电导元件形成负反馈回路以有效地保持全差分输入放大器的输入公共电压，其可以用于全差分感测装置。

公开(公告)号：US07245144B1

公开(公告)日：2007-07-17

申请号：US11169242

申请日：2005-06-27

申请人： Wilson Wong ,  Sergey Shumarayev

发明人： Wilson Wong ,  Sergey Shumarayev

IPC分类号： H03K17/16

CPC分类号： H03K19/018564 ,  H03F3/45928 ,  H03F2203/45078 ,  H03F2203/45082 ,  H03F2203/45101 ,  H03F2203/45134 ,  H03F2203/45138 ,  H03F2203/45154 ,  H03F2203/45222 ,  H03F2203/45541 ,  H03F2203/45566 ,  H03F2203/45626 ,  H03F2203/45681 ,  H03F2203/45686

摘要： Systems and methods are provided using common-mode-voltage bias circuitry to make common-mode-voltage adjustments to differential driver circuitry in integrated circuit differential communications links. Adjustable bias circuitry may be controlled using static and dynamic control signals. Dynamic control signals can be produced by core logic on a programmable logic device or other integrated circuit. Static control signals can be produced by programmable elements. Bias circuit adjustments made at one end of a differential link can be used to improve performance at either end of the link or can be used to improve power consumption or to balance power and performance considerations. The same integrated circuit design can be used in both AC-coupled and DC-coupled environments. The bias circuitry can be formed from an adjustable current source and adjustable resistor. The current source and adjustable resistors can be controlled by the same control signals.

摘要翻译： 使用共模电压偏置电路提供系统和方法，以对集成电路差分通信链路中的差分驱动器电路进行共模电压调整。 可调节的偏置电路可以使用静态和动态控制信号来控制。 动态控制信号可以由可编程逻辑器件或其他集成电路上的核心逻辑产生。 静态控制信号可以由可编程元件产生。 差分链路一端进行的偏置电路调整可用于提高链路两端的性能，或者可用于提高功耗或平衡功率和性能考虑。 同样的集成电路设计可用于交流耦合和直流耦合环境。 偏置电路可以由可调电流源和可调电阻器形成。 电流源和可调电阻可由相同的控制信号控制。

公开(公告)号：US5483194A

公开(公告)日：1996-01-09

申请号：US331286

申请日：1994-10-28

申请人： Pierre Genest

发明人： Pierre Genest

IPC分类号： H03F3/45

CPC分类号： H03F3/45273 ,  H03F3/45179 ,  H03F3/45183 ,  H03F3/45708 ,  H03F3/45717 ,  H03F2200/91 ,  H03F2203/45072 ,  H03F2203/45078 ,  H03F2203/45182 ,  H03F2203/45466 ,  H03F2203/45476 ,  H03F2203/45571 ,  H03F2203/45641 ,  H03F2203/45651

摘要： A differential current mode amplifier device generates a common mode bias current. A translinear multiplier receives at two inputs this common mode bias current and a differential mode current to be amplified and delivers at two outputs an amplified differential mode current. The translinear multiplier is biased in a manner depending on the bias current received by the translinear multiplier. The device includes a circuit for compensating the common mode current at the output of the translinear multiplier.

摘要翻译： 差分电流模式放大器装置产生共模偏置电流。 一个跨导乘法器在两个输入端接收这个共模偏置电流和一个待放大的差模电流，并在两个输出端输出放大的差模电流。 跨导线性乘法器的偏置方式取决于由跨导乘法器接收的偏置电流。 该器件包括用于补偿在跨线性乘法器的输出处的共模电流的电路。

公开(公告)号：US3260947A

公开(公告)日：1966-07-12

申请号：US32068963

申请日：1963-11-01

申请人： NORTH AMERICAN AVIATION INC

发明人： DORSMAN ADRIAN K

IPC分类号： H03F1/34 ,  H03F3/45

CPC分类号： H03F3/45479 ,  H03F1/34 ,  H03F2203/45008 ,  H03F2203/45072 ,  H03F2203/45078