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    Powered transducer preamplifier with DC level shifting circuit
    21.
    发明授权
    Powered transducer preamplifier with DC level shifting circuit 失效
    具有直流电平移位电路的电源传感器前置放大器

    公开(公告)号：US06577187B1

    公开(公告)日：2003-06-10

    申请号：US09594664

    申请日：2000-06-15

    Applicant: Matthew M. Lesko

    Inventor： Matthew M. Lesko

    IPC: H03F2100

    CPC classification number: H03F3/45085 ,  H03F1/30 ,  H03F3/45475 ,  H03F3/45959 ,  H03F3/45991 ,  H03F2203/45371 ,  H03F2203/45591 ,  H03F2203/45688

    Abstract: A powered transducer preamplifier includes a preamplifier circuit that DC couples the preamplifier input with the preamplifier output. A biasing circuit is coupled to the preamplifier input to apply a bias voltage to power the transducer, and a DC level shifting circuit is DC coupled to the signal path of the preamplifier circuit between the input and the output to compensate for this bias voltage. The DC level shifting circuit avoids the use of reactive components, and thereby reduces phase distortion. A variety of DC level shifting circuits can be used, including a bridge circuit having four matched resistors and an inverter DC coupled between the nodes of the bridge.

    Abstract translation: 一个供电的传感器前置放大器包括前置放大器电路，其将前置放大器输入端与前置放大器输出相耦合。 偏置电路耦合到前置放大器输入以施加偏置电压来为换能器供电，并且直流电平移位电路被直流耦合到输入和输出之间的前置放大器电路的信号路径，以补偿该偏置电压。 DC电平移位电路避免使用无功分量，从而减少相位失真。 可以使用各种DC电平移位电路，包括具有四个匹配电阻器的桥式电路和耦合在桥接器节点之间的逆变器DC。

    Apparatus and method for electrical signal amplification
    22.
    发明授权
    Apparatus and method for electrical signal amplification 有权
    电信号放大的装置和方法

    公开(公告)号：US06501332B1

    公开(公告)日：2002-12-31

    申请号：US09615377

    申请日：2000-07-13

    Applicant: Shouli Yan

    Inventor： Shouli Yan

    IPC: H03F136

    CPC classification number: H03F3/45959 ,  H03F1/3223 ,  H03F3/68

    Abstract: An apparatus and method for utilizing a correction loop amplifier in conjunction with a main amplifier to produce signal amplification with low total harmonic distortion. The correction amplifier preferably has one input directly coupled to a first input of the main amplifier, and an output coupled to a second input of the main amplifier via a resistor. The second input of the correction amplifier is preferably coupled to a signal input via a voltage divider or RC network. A preferred embodiment configuration provides a power amplifier with improved THD over prior art circuits. The circuit is very flexible, and may incorporate low, high or band pass filter functions if desired. In addition, the power amplifier may be implemented in any combination of single or differential inputs and outputs.

    Abstract translation: 一种用于与主放大器结合使用校正环路放大器以产生低总谐波失真的信号放大的装置和方法。 校正放大器优选地具有直接耦合到主放大器的第一输入的一个输入和经由电阻耦合到主放大器的第二输入的输出。 校正放大器的第二输入优选地经由分压器或RC网络耦合到输入的信号。 优选的实施例配置提供了一种功率放大器，其具有比现有技术电路更好的THD。 该电路非常灵活，如果需要，可以并入低，高或带通滤波器功能。 此外，功率放大器可以以单个或差分输入和输出的任何组合来实现。

    Semiconductor integrated circuit
    23.
    发明授权
    Semiconductor integrated circuit 失效
    半导体集成电路

    公开(公告)号：US06476676B1

    公开(公告)日：2002-11-05

    申请号：US09889154

    申请日：2001-07-12

    Applicant: Satoshi Tanaka ,  Shigetaka Takagi ,  Nobuo Fujii

    Inventor： Satoshi Tanaka ,  Shigetaka Takagi ,  Nobuo Fujii

    IPC: H03F345

    CPC classification number: H03F3/45959 ,  H03F3/45291 ,  H03F3/45946 ,  H03F2200/372 ,  H03H11/0422 ,  H03H2011/0494

    Abstract: When an input signal to be amplified is very small and a large blocking signal having a high frequency is included in an input, it is necessary for a filter for mobile communication for removing thereof that a common-mode signal rejection ratio is large. Further, even in the case of an amplifier having a high gain, it is preferable that the common-mode rejection ratio is large in order to avoid saturation of the amplifier by noise. A common-mode rejecting characteristic is added to an input stage by making transconductance circuits of an input of an integrating circuit proposed by Nauta differential circits and connecting thereof in cross connection. Thereby, a filter as well as an amplifier improving the common-mode rejection ratio of a total, are realized by being applied to a CMOS process or a BiCMOS process.

    Abstract translation: 当要被放大的输入信号非常小并且具有高频率的大阻塞信号被包括在输入中时，移动通信用滤波器需要去除共模信号抑制比大。 此外，即使在具有高增益的放大器的情况下，为了避免放大器的噪声饱和，优选地，共模抑制比较大。 通过使Nauta差分电路提出的积分电路的输入的跨导电路和其交叉连接而将共模抑制特性添加到输入级。 因此，通过应用于CMOS工艺或BiCMOS工艺来实现滤波器以及提高总共模抑制比的放大器。

    Signal amplifier and optical signal receiver using the same
    24.
    发明申请
    Signal amplifier and optical signal receiver using the same 有权
    信号放大器和光信号接收机使用相同

    公开(公告)号：US20020153958A1

    公开(公告)日：2002-10-24

    申请号：US10171559

    申请日：2002-06-12

    Inventor： Satoshi Ide

    IPC: H03F003/08

    CPC classification number: H04B10/6933 ,  H03F3/087 ,  H03F3/45959 ,  H03F3/45982 ,  H03G3/3084 ,  H04B10/6931

    Abstract: To provide configuration of a signal amplifier and an optical signal receiver using the same, enabling to solve a problem of waveform deterioration being produced by external noise, etc. in the signal amplifier of the optical signal receiver. The optical signal receiver includes a first master-slave level detector for detecting a DC level of a normal phase signal, and a second master-slave level detector for detecting a DC level of an inverse phase signal. By adding alternated signal components respectively, a differential signal transmission is enabled. Accordingly, using two master-slave level detector having mutually symmetric configurations and thus enabling differential transmission, there can be obtained a signal amplifier which can cope with various transient responses produced at the top of a burst cell and is sufficiently protected against the disturbance produced by external noises.

    Abstract translation: 为了提供信号放大器和使用其的光信号接收器的配置，能够解决光信号接收机的信号放大器中的外部噪声等产生的波形恶化的问题。 光信号接收机包括用于检测正相信号的直流电平的第一主从电平检测器和用于检测逆相位信号的直流电平的第二主 - 从电平检测器。 通过分别添加交替信号分量，启用差分信号传输。 因此，使用具有相互对称配置的两个主从电平检测器，从而实现差分传输，可以获得可以应付在突发电池单元顶部产生的各种瞬态响应的信号放大器，并且被充分保护以防止由 外部噪音

    Universal connector means for transducer/monitor systems
    25.
    发明授权
    Universal connector means for transducer/monitor systems 失效
    用于传感器/监视系统的通用连接器装置

    公开(公告)号：US5193547A

    公开(公告)日：1993-03-16

    申请号：US945381

    申请日：1986-12-22

    Applicant: George D. Evans, II ,  Jacob J. Norman ,  H. Don Phillips

    Inventor： George D. Evans, II ,  Jacob J. Norman ,  H. Don Phillips

    IPC: A61B5/021 ,  A61B5/04 ,  H03F3/45

    CPC classification number: H03F3/45959 ,  A61B5/021 ,  A61B5/04004 ,  H03F3/45475 ,  H03F3/45479 ,  A61B2560/045

    Abstract: A system for monitoring physiological conditions in humans and other animals includes a transducer for monitoring such conditions as blood pressure, a monitor for displaying or recording signals from such transducers, or both, and a connector for linking the transducer to the monitor and for transforming the impedance level of signals from such transducer to levels appropriate for such monitors and for drawing and adapting power from the monitor for effecting this impedance transformation. The connector may also include a mechanism for adjusting the offset or sensitivity of the signal from the transducer, a mechanism for detecting the absence of the transducer, and a mechanism for detecting an open circuit between the monitor and the transducer. A connector may also include a device for converting power drawn from a monitor to direct current where the power drawn from the monitor is, before conversion, either sine wave or pulsed; a mechanism for regulating the current from the monitor; and a mechanism for eliminating common-mode voltage errors from the transducer signal.

    Abstract translation: 用于监测人和其他动物的生理状况的系统包括用于监测诸如血压的状况的换能器，用于显示或记录来自这些换能器或两者的信号的监视器，以及用于将换能器连接到监视器并用于将 来自这种传感器的信号的阻抗水平适合于这样的监视器，并用于绘制和调整来自监视器的功率以实现该阻抗变换。 连接器还可以包括用于调整来自换能器的信号的偏移或灵敏度的机构，用于检测换能器不存在的机构，以及用于检测监视器和换能器之间的开路的机构。 连接器还可以包括用于将从监视器抽取的功率转换成从监视器抽取的功率到转换之前的正弦波或脉冲的直流电的装置; 用于调节来自监视器的电流的机构; 以及用于从换能器信号消除共模电压误差的机构。

    PHASE SHORTING SWITCH
    29.
    发明申请
    PHASE SHORTING SWITCH 有权
    相位短路开关

    公开(公告)号：US20170047939A1

    公开(公告)日：2017-02-16

    申请号：US15236163

    申请日：2016-08-12

    Applicant: Cirrus Logic International Semiconductor Ltd.

    Inventor： Ramin Zanbaghi ,  Aaron Brennan ,  Daniel J. Allen ,  John L. Melanson

    IPC: H03M1/14 ,  G06F17/11 ,  H04R3/00 ,  H03M3/00

    CPC classification number: H03M1/14 ,  G06F17/11 ,  G11C27/024 ,  H03F3/005 ,  H03F3/45475 ,  H03F3/45959 ,  H03F2203/45421 ,  H03F2203/45512 ,  H03F2203/45544 ,  H03F2203/45551 ,  H03M1/124 ,  H03M1/1295 ,  H03M3/458 ,  H03M3/496 ,  H04R3/00 ,  H04R19/04 ,  H04R29/004 ,  H04R2420/05 ,  H04R2499/11

    Abstract: An analog-to-digital converter (ADC) may include capability to sense and/or compensate for undesired effects when receiving input from a microphone. For example, a sense node may be provided between differential inputs, and that sense node separated from the differential inputs by two or more switches. The sense node may allow for a measurement of an average voltage of the differential inputs. The average voltage may be obtained activating the switches to sample the sampling capacitors coupled to the differential inputs. That average voltage may be used as common mode (CM) data. A controller may receive the CM data, along with differential mode (DM) data, and use the CM and DM data to determine undesired effects, such as DC or AC mismatch at the microphone interface. The controller may then generate a signal for applying compensation to the differential inputs to reduce or eliminate the undesired effects.

    Abstract translation: 模数转换器（ADC）可以包括当从麦克风接收输入时感测和/或补偿不期望的效果的能力。 例如，可以在差分输入之间提供感测节点，并且感测节点可以由两个或更多个开关与差分输入分离。 感测节点可以允许差分输入的平均电压的测量。 可以获得平均电压来激活开关以采样耦合到差分输入的采样电容器。 该平均电压可以用作共模（CM）数据。 控制器可以与差分模式（DM）数据一起接收CM数据，并使用CM和DM数据来确定不期望的效果，例如麦克风接口处的DC或AC失配。 然后，控制器可以生成用于向差分输入施加补偿的信号，以减少或消除不期望的影响。

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