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    AMPLIFIER CIRCUIT FOR AMPLIFYING AN OUTPUT SIGNAL OF A CAPACITIVE SENSOR
    42.
    发明申请
    AMPLIFIER CIRCUIT FOR AMPLIFYING AN OUTPUT SIGNAL OF A CAPACITIVE SENSOR 审中-公开
    放大器电路用于放大电容式传感器的输出信号

    公开(公告)号：WO2017129396A1

    公开(公告)日：2017-08-03

    申请号：PCT/EP2017/050416

    申请日：2017-01-10

    Applicant: AMS AG

    Inventor： PERKTOLD, Lukas ,  NIEDERBERGER, Mark ,  BLATTMANN, René

    IPC: H03F1/30 ,  H03F1/34 ,  H03F1/42 ,  H03F3/181 ,  H04R3/00

    CPC classification number: H03F1/301 ,  H03F1/342 ,  H03F1/42 ,  H03F3/181 ,  H03F2200/03 ,  H03F2200/126 ,  H03F2200/129 ,  H03F2200/144 ,  H03F2200/36 ,  H03F2200/42 ,  H03F2200/471 ,  H04R3/00 ,  H04R19/04

    Abstract: An amplifier circuit (AC) for amplifying an output signal (OS) of a capacitive sensor (M) comprises a first input terminal (AIN) to receive the output signal (OS) of the capacitive sensor (M) and a second input terminal (BIN) to receive a bias voltage (Vbias) of the capacitive sensor (M). The amplifier circuit (AC) comprises an amplifier (A) for amplifying the output signal (OS) and a control circuit (CF) arranged in a feedback loop (FL) of the amplifier (A) being configured to control a DC voltage level at an input connection (A1) of the amplifier (A). A bias voltage sensing circuit (BVS) senses a change of the level of the bias voltage (Vbias) at the second input terminal (BIN) and changes the bandwidth of the feedback loop (FL) in dependence on the sensed change of the level of the bias voltage (Vbias).

    Abstract translation: 用于放大电容式传感器（M）的输出信号（OS）的放大器电路（AC）包括：第一输入端子（AIN），用于接收电容式传感器（M）的输出信号（OS） M）和第二输入端子（BIN）以接收电容式传感器（M）的偏置电压（Vbias）。 放大器电路（AC）包括用于放大输出信号（OS）的放大器（A）和布置在放大器（A）的反馈回路（FL）中的控制电路（CF），该控制电路被配置为将DC电压电平控制在 放大器（A）的输入连接（A1）。 偏置电压感测电路（BVS）感测第二输入端子（BIN）处的偏置电压（Vbias）的电平的变化，并且根据所感测的电平的变化来改变反馈回路​​（FL）的带宽 偏置电压（Vbias）。

    DEVICE FOR AMPLIFYING AN AUDIO SIGNAL
    43.
    发明申请
    DEVICE FOR AMPLIFYING AN AUDIO SIGNAL 审中-公开
    用于放大音频信号的装置

    公开(公告)号：WO2017081571A1

    公开(公告)日：2017-05-18

    申请号：PCT/IB2016/056412

    申请日：2016-10-25

    Applicant: ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

    Inventor： ROMEO, Giovanni

    IPC: H03F3/187 ,  H03F3/45 ,  H03F1/56 ,  H04R3/00

    CPC classification number: H03F3/187 ,  H03F1/56 ,  H03F3/45475 ,  H03F2200/03 ,  H03F2200/321 ,  H03F2200/387 ,  H03F2200/435 ,  H03F2200/462 ,  H03F2200/471 ,  H03F2203/45138 ,  H04R3/002 ,  H04R3/007 ,  H04R2400/00

    Abstract: The invention relates to a device (12) for amplifying audio signals, comprising an amplifier (121) adapted to receive a first signal as input and to output a second signal capable of powering a loudspeaker (R L ), control means (122) configured for detecting the current and voltage of the second signal and for controlling said amplifier on the basis of the voltage of the first signal and of selection information (k) that allows selecting whether the amplifier (121) is also driven on the basis of the voltage or current of the second signal, tuning means (123) configured for changing the output impedance of the device (12) so that, when the first audio signal has constant frequency and voltage, the voltage of the second signal will be independent of the selection information (k) used by the control means for controlling said amplifier (121).

    Abstract translation: 本发明涉及一种用于放大音频信号的设备（12），包括适于接收作为输入的第一信号的放大器（121）并且输出能够为扬声器（R 1）供电的第二信号， （122），其被配置用于检测第二信号的电流和电压，并且用于基于第一信号的电压和选择信息（k）来控制所述放大器，所述选择信息（k）允许选择 根据第二信号的电压或电流来驱动放大器（121）;调谐装置（123），其被配置用于改变装置（12）的输出阻抗，使得当第一音频信号具有恒定的频率 和电压，第二信号的电压将独立于用于控制所述放大器（121）的控制装置所使用的选择信息（k）。

    LOW-HEADROOM CONSTANT CURRENT SOURCE FOR HIGH-CURRENT APPLICATIONS
    44.
    发明申请
    LOW-HEADROOM CONSTANT CURRENT SOURCE FOR HIGH-CURRENT APPLICATIONS 审中-公开
    用于高电流应用的低头恒定电流源

    公开(公告)号：WO2017080012A1

    公开(公告)日：2017-05-18

    申请号：PCT/CN2015/096872

    申请日：2015-12-09

    Applicant: HONG KONG APPLIED SCIENCE & TECHNOLOGY RESEARCH INSTITUTE COMPANY LIMITED

    Inventor： CAI, Guangjie ,  WAN, Ho Ming, Karen ,  WONG, Chun Fai ,  WONG, Tai Yin

    IPC: G05F1/565

    CPC classification number: H05B33/0806 ,  H03F3/345 ,  H03F3/45179 ,  H03F2200/462 ,  H03F2200/471 ,  H03F2200/474 ,  H03F2200/91 ,  H03K17/6872 ,  H05B33/0827 ,  H05B33/0842

    Abstract: A low-headroom current driver does not use an op amp or resistor. A sensing transistor (54) having its source connected to a drain of an output transistor (56) senses variations in an output current (i_OUT). The gate, source, and drain voltages of the sensing transistor (54) are mirrored to a sense mirror transistor (44) to control a sense current. The sense current is mirrored to a reference source transistor (20) to generate a mirrored sense current. An error between the mirrored sense current and a fixed reference current is stored as charge on an error-storing capacitor (60). The stored error charge creates a negative-feedback compensation current that adjusts a gate voltage generated by a feedback-driving transistor (36). The adjusted gate voltage controls the gate of the output transistor (56) to compensated using a sense-mirror tail transistor (46) connected to the sense mirror transistor (44).

    Abstract translation:

    低裕量电流驱动器不使用运算放大器或电阻器。 其源极连接到输出晶体管（56）的漏极的感测晶体管（54）感测输出电流（i_OUT）的变化。 感测晶体管（54）的栅极，源极和漏极电压镜像到感测镜像晶体管（44）以控制感测电流。 感测电流镜像到参考源晶体管（20）以产生镜像感测电流。 镜像传感电流和固定参考电流之间的误差作为电荷存储在误差存储电容器（60）上。 所存储的误差电荷产生调整由反馈驱动晶体管（36）产生的栅极电压的负反馈补偿电流。 调节的栅极电压控制输出晶体管（56）的栅极以使用连接到感测镜像晶体管（44）的感测反射镜尾部晶体管（46）进行补偿。

    METHOD AND APPARATUS FOR MAINTAINING DC BIAS
    45.
    发明申请
    METHOD AND APPARATUS FOR MAINTAINING DC BIAS 审中-公开
    维护直流偏置的方法和装置

    公开(公告)号：WO2017065965A1

    公开(公告)日：2017-04-20

    申请号：PCT/US2016/053728

    申请日：2016-09-26

    Applicant: KNOWLES ELECTRONICS, LLC

    Inventor： JENNINGS, Michael ,  BADILLO, Dean ,  STEIN, Craig

    IPC: H03F1/30 ,  H03F3/181 ,  H04R3/00

    CPC classification number: H03F1/0205 ,  H03F1/30 ,  H03F1/32 ,  H03F3/04 ,  H03F3/181 ,  H03F2200/03 ,  H03F2200/18 ,  H03F2200/228 ,  H03F2200/42 ,  H03F2200/453 ,  H03F2200/471 ,  H03F2200/555 ,  H03F2200/78 ,  H04R3/00 ,  H04R2410/00

    Abstract: A direct current (DC) bias maintenance circuit operably couples to the input of a primary amplifier. The DC bias maintenance circuit employs feedback to maintain the desired DC bias but lacks any coupling to the output of the primary amplifier. By one approach the DC bias maintenance circuit includes a secondary amplifier that replicates at least some near real-time performance characteristics of the primary amplifier. For example, the secondary amplifier can replicate at least certain DC properties of the primary amplifier such that DC-based changes appearing at the output of the primary amplifier are mirrored at an output of the secondary amplifier notwithstanding a lack of any coupling between the output of the primary amplifier and the DC bias maintenance circuit.

    Abstract translation: 直流（DC）偏压维持电路可操作地耦合到主放大器的输入。 直流偏置维持电路采用反馈来保持所需的直流偏置，但缺少与主放大器输出的任何耦合。 通过一种方法，DC偏置维持电路包括复制主放大器的至少一些接近实时性能特性的次级放大器。 例如，次级放大器可以复制初级放大器的至少某些DC属性，使得出现在初级放大器的输出处的基于DC的变化在次级放大器的输出处被镜像，尽管缺少输出端之间的任何耦合 主放大器和直流偏置维护电路。

    COMMUNICATIONS BASED ADJUSTMENTS OF AN ENVELOPE TRACKING POWER SUPPLY
    48.
    发明申请
    COMMUNICATIONS BASED ADJUSTMENTS OF AN ENVELOPE TRACKING POWER SUPPLY 审中-公开
    基于通信的包装跟踪电源的调整

    公开(公告)号：WO2014116933A3

    公开(公告)日：2014-11-20

    申请号：PCT/US2014012927

    申请日：2014-01-24

    Applicant: RF MICRO DEVICES INC

    Inventor： KHLAT NADIM ,  KAY MICHAEL R ,  NAG MANBIR SINGH

    IPC: H03F3/189 ,  H02M1/00 ,  H02M3/158

    CPC classification number: H03F1/0227 ,  H02M2001/0045 ,  H03F1/0266 ,  H03F3/195 ,  H03F3/24 ,  H03F2200/375 ,  H03F2200/432 ,  H03F2200/451 ,  H03F2200/471 ,  H03F2200/555

    Abstract: A parallel amplifier and a parallel amplifier power supply are disclosed according to one embodiment of the present disclosure. The parallel amplifier power supply provides a parallel amplifier power supply signal, which is adjustable on a communications slot-to-communications slot basis. During envelope tracking, the parallel amplifier regulates an envelope power supply voltage based on the parallel amplifier power supply signal. The parallel amplifier and an offset capacitance voltage control loop are disclosed according to an alternate embodiment of the present disclosure. The parallel amplifier has a parallel amplifier output, which is coupled to an envelope tracking power supply output via an offset capacitive element. The offset capacitive element has an offset capacitive voltage. The offset capacitance voltage control loop regulates the offset capacitive voltage, which is adjustable on a communications slot-to-communications slot basis.

    Abstract translation: 根据本公开的一个实施例公开了一种并行放大器和并行放大器电源。 并联放大器电源提供并行放大器电源信号，可以在通信插槽到通信插槽的基础上进行调整。 在包络跟踪期间，并联放大器基于并行放大器电源信号调节包络电源电压。 根据本公开的替代实施例公开了并联放大器和偏移电容电压控制环路。 并联放大器具有并联放大器输出，其通过偏移电容元件耦合到包络跟踪电源输出。 偏移电容元件具有偏移电容电压。 偏移电容电压控制回路调节偏移电容电压，其可以在通信插槽到通信插槽的基础上进行调整。

    COMMUNICATIONS BASED ADJUSTMENTS OF AN ENVELOPE TRACKING POWER SUPPLY
    49.
    发明申请
    COMMUNICATIONS BASED ADJUSTMENTS OF AN ENVELOPE TRACKING POWER SUPPLY 审中-公开
    基于通信的包络跟踪电源调整

    公开(公告)号：WO2014116933A2

    公开(公告)日：2014-07-31

    申请号：PCT/US2014/012927

    申请日：2014-01-24

    Applicant: RF MICRO DEVICES, INC

    Inventor： KHLAT, Nadim ,  KAY, Michael R. ,  NAG, Manbir Singh

    IPC: H03F3/189

    CPC classification number: H03F1/0227 ,  H02M2001/0045 ,  H03F1/0266 ,  H03F3/195 ,  H03F3/24 ,  H03F2200/375 ,  H03F2200/432 ,  H03F2200/451 ,  H03F2200/471 ,  H03F2200/555

    Abstract: A parallel amplifier and a parallel amplifier power supply are disclosed according to one embodiment of the present disclosure. The parallel amplifier power supply provides a parallel amplifier power supply signal, which is adjustable on a communications slot-to-communications slot basis. During envelope tracking, the parallel amplifier regulates an envelope power supply voltage based on the parallel amplifier power supply signal. The parallel amplifier and an offset capacitance voltage control loop are disclosed according to an alternate embodiment of the present disclosure. The parallel amplifier has a parallel amplifier output, which is coupled to an envelope tracking power supply output via an offset capacitive element. The offset capacitive element has an offset capacitive voltage. The offset capacitance voltage control loop regulates the offset capacitive voltage, which is adjustable on a communications slot-to-communications slot basis.

    Abstract translation: 根据本公开的一个实施例公开了一种并行放大器和并联放大器电源。 并行放大器电源提供并行放大器电源信号，该信号可在通信时隙到通信时隙的基础上进行调整。 在包络跟踪期间，并行放大器基于并行放大器电源信号来调节包络电源电压。 根据本公开的替代实施例公开了并联放大器和偏移电容电压控制回路。 并联放大器有一个并联放大器输出，它通过偏置电容元件与包络跟踪电源输出相连。 偏移电容元件具有偏移电容电压。 偏移电容电压控制环路调节偏移电容电压，可在通信插槽对通信时隙的基础上进行调节。

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