公开(公告)号：US5381113A

公开(公告)日：1995-01-10

申请号：US149556

申请日：1993-11-09

申请人： Katsuji Kimura

发明人： Katsuji Kimura

IPC分类号： H03F1/32 ,  H03F3/45

CPC分类号： H03F3/45708 ,  H03F1/3211 ,  H03F3/45183 ,  H03F2203/45008 ,  H03F2203/45074 ,  H03F2203/45078 ,  H03F2203/45424 ,  H03F2203/45466 ,  H03F2203/45674

摘要： A differential amplifier circuit including a quadritail circuit and a differential pair of transistors. The quadritail circuit has a first pair of first and second MOS transistors, a second pair of third and fourth MOS transistors, and a constant current source for driving the first and second pairs. The differential pair is composed of fifth and sixth MOS transistors and driven by an output current of the quadritail circuit. An input voltage is applied between the gates of the first and second transistors and between the gates of the fifth and sixth transistors. A DC voltage is applied to the common-connected gates of the third and fourth transistors. An output current is derived from an output end of the differential pair. The transconductance linearity of the differential amplifier circuit can be improved.

摘要翻译： 一种差分放大器电路，包括一个四边形电路和一对差分晶体管。 四边形电路具有第一对第一和第二MOS晶体管，第二对第三和第四MOS晶体管和用于驱动第一和第二对的恒流源。 差分对由第五和第六MOS晶体管组成，并由四边形电路的输出电流驱动。 在第一和第二晶体管的栅极之间以及第五和第六晶体管的栅极之间施加输入电压。 DC电压被施加到第三和第四晶体管的共同连接的栅极。 从差分对的输出端导出输出电流。 可以提高差分放大器电路的跨导线性度。

公开(公告)号：US20180019718A1

公开(公告)日：2018-01-18

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：US09438188B2

公开(公告)日：2016-09-06

申请号：US14486885

申请日：2014-09-15

申请人： QUALCOMM Incorporated

发明人： Miao Li ,  Li Sun ,  Zhi Zhu

IPC分类号： H04L25/06 ,  H03F3/45 ,  H03F3/183 ,  H04B1/16 ,  H04L25/02

CPC分类号： H03F3/45071 ,  H03F3/183 ,  H03F3/45179 ,  H03F3/45677 ,  H03F3/45713 ,  H03F2200/129 ,  H03F2200/255 ,  H03F2200/36 ,  H03F2200/453 ,  H03F2203/45008 ,  H03F2203/45078 ,  H03F2203/45112 ,  H03F2203/45302 ,  H03F2203/45306 ,  H03F2203/45418 ,  H03F2203/45422 ,  H03F2203/45424 ,  H04B1/16 ,  H04L25/0272

摘要： In one embodiment, a receiver comprises a differential common-gate amplifier having a differential input and a differential output, wherein the differential input comprises a first input and a second input, and the differential common-gate amplifier is configured to amplify an input differential signal at the differential input into an amplified differential signal at the differential output. The receiver also comprises a common-mode voltage sensor configured to sense a common-mode voltage of the input differential signal, a replica circuit configured to generate a replica voltage that tracks a direct current (DC) voltage at at least one of the first and second inputs, and a comparator configured to compare the sensed common-mode voltage with the replica voltage, and to adjust a first bias voltage input to the differential common-gate amplifier based on the comparison, wherein the DC voltage depends on the first bias voltage.

摘要翻译： 在一个实施例中，接收机包括具有差分输入和差分输出的差分共栅放大器，其中差分输入包括第一输入和第二输入，并且差分共栅放大器被配置为放大输入差分信号 在差分输入处的差分输出处的放大的差分信号。 接收机还包括被配置为感测输入差分信号的共模电压的共模电压传感器，复制电路被配置为产生在第一和第二和第二至少一个处跟踪直流（DC）电压的复制电压 第二输入和比较器，被配置为将感测的共模电压与复制电压进行比较，并且基于比较来调整输入到差分公共栅放大器的第一偏置电压，其中DC电压取决于第一偏置电压 。

公开(公告)号：US20160013769A1

公开(公告)日：2016-01-14

申请号：US14483541

申请日：2014-09-11

申请人： AMtek SEMICONDUCTOR CO., LTD.

发明人： Teng-Hui LEE ,  Chen-Pin LO ,  Keng-Yi WU

IPC分类号： H03F3/45 ,  H02J7/00 ,  H02J7/02

CPC分类号： H02J7/007 ,  H02J7/0077 ,  H02J7/025 ,  H02J50/00 ,  H03F3/45475 ,  H03F3/45762 ,  H03F2200/375 ,  H03F2200/78 ,  H03F2203/45048 ,  H03F2203/45078 ,  H03F2203/45212 ,  H03F2203/45588 ,  H03F2203/45594 ,  H03F2203/45604 ,  H03K5/003 ,  H03K5/007

摘要： A driving device with correction function is provided herein and utilizes a sensing resistor to detect the variation in an operation amplifier. A signal generated by an offset voltage correction circuit is fed back to the operation amplifier and the offset voltage of the abnormal input in the operation amplifier is corrected to be zero so as to keep the operation amplifier under the best performance condition. The driving device implements in the wireless charger driving system can enhance the accuracy of the current value and can achieve good output performance and better system stability.

摘要翻译： 本发明提供具有校正功能的驱动装置，利用感测电阻来检测运算放大器的变化。 由偏移电压校正电路产生的信号被反馈到运算放大器，将运算放大器中的异常输入的偏移电压校正为零，以保持运算放大器处于最佳性能状态。 在无线充电器驱动系统中实现的驱动装置可以提高电流值的精度，可以实现良好的输出性能和更好的系统稳定性。

公开(公告)号：US20150349733A1

公开(公告)日：2015-12-03

申请号：US14602697

申请日：2015-01-22

申请人： QUALCOMM Incorporated

发明人： Minghui Chen ,  Mahim Ranjan ,  Jeremy Mark Goldblatt ,  Frederic Bossu

IPC分类号： H03F3/45

CPC分类号： H03F3/45479 ,  H02M2001/123 ,  H03F3/45475 ,  H03F3/45556 ,  H03F2203/45078 ,  H03F2203/45418 ,  H03F2203/45424 ,  H03F2203/45526 ,  H03M1/0607 ,  H03M1/66

摘要： Removing common-mode current from a pair of complementary current signals, including: generating a common-mode voltage of the pair of complementary current signals including at least a first current signal and a second current signal; measuring and outputting a difference voltage between the generated common-mode voltage and a common-mode reference voltage; and removing at least a portion of the common-mode current from the first current signal and the second current signal based on the difference voltage.

摘要翻译： 从一对互补电流信号中去除共模电流，包括：产生包括至少第一电流信号和第二电流信号的一对互补电流信号的共模电压; 测量并输出所产生的共模电压和共模参考电压之间的差分电压; 以及基于所述差电压从所述第一电流信号和所述第二电流信号中去除所述共模电流的至少一部分。

公开(公告)号：US09035698B2

公开(公告)日：2015-05-19

申请号：US14018267

申请日：2013-09-04

申请人： Oracle International Corporation

发明人： Shao H. Liu ,  Peter H. Richert

IPC分类号： H03G3/30 ,  H03F3/45

CPC分类号： H03G3/30 ,  H03F3/45179 ,  H03F3/45475 ,  H03F2200/453 ,  H03F2203/45048 ,  H03F2203/45078 ,  H03G3/3036

摘要： Embodiments include systems and methods for accurately controlling gain of a high-speed variable-gain amplifier (VGA) without adversely impacting bandwidth performance. Embodiments include a VGA with a variable resistor, for which resistance is a function of a control level. A gain calibration system controls the control level by using a gain control feedback subsystem to sample outputs of a duplicate VGA, which includes a duplicate variable resistor. The sampled duplicate outputs are compared to a target gain generated by a reference generator. The control level can be fed back to control the gain of the duplicate VGA until the target gain is reached. The control level can also be fed to the actual VGA to control its gain. By performing gain control on the duplicate VGA without interfering with the output signal path of the actual VGA, the actual VGA's gain can be accurately controlled without impacting its bandwidth.

摘要翻译： 实施例包括用于精确地控制高速可变增益放大器（VGA）的增益而不会不利地影响带宽性能的系统和方法。 实施例包括具有可变电阻器的VGA，其电阻是控制电平的函数。 增益校准系统通过使用增益控制反馈子系统对包含一个可重复的可变电阻器的重复VGA的输出进行采样来控制控制电平。 将采样的重复输出与由参考发生器产生的目标增益进行比较。 可以反馈控制电平以控制重复VGA的增益，直到达到目标增益。 控制电平也可以馈送到实际的VGA来控制其增益。 通过对重复的VGA执行增益控制，而不会干扰实际VGA的输出信号路径，实际的VGA增益可以精确控制，而不会影响其带宽。

公开(公告)号：US08941440B2

公开(公告)日：2015-01-27

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 ,  H03F3/08

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。

公开(公告)号：US08366628B2

公开(公告)日：2013-02-05

申请号：US12832098

申请日：2010-07-08

申请人： Stephen T. Denker ,  Cherik Bulkes

发明人： Stephen T. Denker ,  Cherik Bulkes

IPC分类号： A61B5/02

CPC分类号： A61B5/04012 ,  A61B5/0428 ,  A61B5/7203 ,  A61B5/7239 ,  H03F3/45928 ,  H03F2200/165 ,  H03F2200/171 ,  H03F2200/261 ,  H03F2203/45008 ,  H03F2203/45078 ,  H03F2203/45136

摘要： An implantable apparatus for sensing biological signals from an animal includes at least two electrodes disposed at locations to sense the biological signals. The electrode locations may be internal or external to the animal. Insulated conductors couple the electrodes via a passive network of filters to an instrumentation amplifier that has an internal voltage reference. Thus a sensed biological signal is filtered and amplified to provide an amplified differential signal. A signal analysis module processes amplified differential signal to determine at least one physiological parameter of the animal. The signal analysis module may include a first derivative zero detector for signal transition detection and feature detection and analysis. The apparatus may also comprise a signal presentation module to display amplified signals and physiological parameters associated with those signals.

摘要翻译： 用于感测来自动物的生物信号的可植入装置包括设置在感测生物信号的位置处的至少两个电极。 电极位置可以是动物的内部或外部。 绝缘导体通过无源滤波器将电极耦合到具有内部参考电压的仪表放大器。 因此，感测的生物信号被滤波和放大以提供放大的差分信号。 信号分析模块处理放大的差分信号以确定动物的至少一个生理参数。 信号分析模块可以包括用于信号转换检测和特征检测和分析的一阶导数零检测器。 该装置还可以包括用于显示与这些信号相关联的放大信号和生理参数的信号呈现模块。

公开(公告)号：US20110057727A1

公开(公告)日：2011-03-10

申请号：US12557139

申请日：2009-09-10

申请人： Hayden C. Cranford, JR. ,  Todd M. Rasmus ,  Joseph M. Stevens

发明人： Hayden C. Cranford, JR. ,  Todd M. Rasmus ,  Joseph M. Stevens

IPC分类号： H03F3/45

CPC分类号： H03F3/45183 ,  H03F1/3211 ,  H03F3/45632 ,  H03F2203/45008 ,  H03F2203/45078 ,  H03F2203/45292 ,  H03F2203/45342

摘要： A method and apparatus for extending the common mode range of a differential amplifier. A circuit has a common mode detection circuit, a common mode voltage inversion circuit, and a differential amplifier. The common mode detection circuit receives a differential signal and detects a common mode voltage. The common mode voltage inversion circuit is coupled to the common mode detection circuit. The common mode voltage inversion circuit has an input node that receives the common mode voltage and an output node that outputs body voltage, wherein the common mode voltage inversion circuit creates an inverse relationship between the common mode voltage and the body voltage. The differential amplifier includes a differential pair of transistors that have a pair of body terminals coupled to the output node of the common mode voltage inversion circuit.

摘要翻译： 一种用于扩展差分放大器的共模范围的方法和装置。 电路具有共模检测电路，共模电压反相电路和差分放大器。 共模检测电路接收差分信号并检测共模电压。 共模电压反相电路耦合到共模检测电路。 共模电压反相电路具有接收共模电压的输入节点和输出体电压的输出节点，其中共模电压反相电路在共模电压和体电压之间产生反向关系。 差分放大器包括具有耦合到共模电压反相电路的输出节点的一对主体端子的差分对晶体管。

公开(公告)号：US07365600B1

公开(公告)日：2008-04-29

申请号：US11142477

申请日：2005-06-02

申请人： Kristiaan Bernard Peter Lokere

发明人： Kristiaan Bernard Peter Lokere

IPC分类号： H03F3/45

CPC分类号： H03F3/45475 ,  H03F3/45085 ,  H03F3/45569 ,  H03F3/4595 ,  H03F2200/453 ,  H03F2203/45061 ,  H03F2203/45074 ,  H03F2203/45078 ,  H03F2203/45082 ,  H03F2203/45138 ,  H03F2203/45352 ,  H03F2203/45681

摘要： A differential amplification circuit includes a differential amplifier and common mode control circuitry configured to control output common mode of the differential amplifier. However, this control circuitry does not use feedback. The circuitry controls the output common mode in either, or in a combination of two ways, neither of which employs feedback from the output common mode. One control technique uses a dummy circuit and comparator to cancel out the effect of variations in process, temperature and supply voltage on output common mode. Another control technique measures input common mode voltage, compares the measured common mode to a reference, and based on the difference, applies a current to the output that compensates for the variation in output common mode that a given input common mode would otherwise cause.

摘要翻译： 差分放大电路包括差分放大器和配置成控制差分放大器的输出共模的共模控制电路。 但是，该控制电路不使用反馈。 电路以两种方式或两种方式的组合来控制输出共模，两者都不使用来自输出共模的反馈。 一种控制技术使用虚拟电路和比较器来消除工艺，温度和电源电压在输出共模上的变化的影响。 另一种控制技术测量输入共模电压，将测量的共模与参考值进行比较，并根据差值，将电流施加到输出，补偿输出共模的变化，给定的输入共模将另外导致。