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    HEADSET AMPLIFICATION CIRCUIT WITH ERROR VOLTAGE SUPPRESSION
    1.
    发明申请
    HEADSET AMPLIFICATION CIRCUIT WITH ERROR VOLTAGE SUPPRESSION 有权
    具有错误电压抑制的HEADSET放大电路

    公开(公告)号：US20160100243A1

    公开(公告)日：2016-04-07

    申请号：US14506062

    申请日：2014-10-03

    Applicant: Ulrik Sørensen Wismar ,  Sejun Kim

    Inventor： Ulrik Sørensen Wismar ,  Sejun Kim

    IPC: H04R1/10 ,  H03F3/181

    CPC classification number: H04R1/1041 ,  H03F3/187 ,  H03F3/45475 ,  H03F2200/03 ,  H03F2200/189 ,  H03F2203/45541 ,  H03F2203/45544 ,  H03F2203/45586 ,  H03F2203/45588 ,  H03F2203/45622 ,  H04R5/033 ,  H04R5/04 ,  H04R29/001

    Abstract: A headset driver circuit is described which comprises a connector interface. The connector interface comprises a first terminal, a second terminal and a third terminal for establishing respective electrical connections to a first speaker, a microphone and a common ground node of a headphone, earphone or headset, respectively. A first power amplifier is coupled to the first terminal to supply a first audio output signal to the first speaker of the headset. A first switch arrangement comprises a first ground switch is configured for selectively connecting and disconnecting the second terminal and a ground node of the headset driver circuit. The headset driver circuit further comprises a second ground switch configured for selectively connecting and disconnecting the third terminal and the ground node. The headset driver circuit also comprises a differential preamplifier, e.g. a microphone preamplifier, configured to generate a microphone output voltage where the differential preamplifier comprises a first signal input coupled to the second terminal and a second signal input coupled to the third terminal of the connector interface. An error suppression circuit is configured to sense or sample a noise or error voltage at the second terminal when ground connected or the third terminal when ground connected. The error suppression circuit is further configured to add the sensed or sampled noise or error voltage to a predetermined DC bias voltage and generate an error compensated DC bias voltage for the ungrounded one of the second and third terminals of the connector interface.

    Abstract translation: 描述了包括连接器接口的耳机驱动器电路。 连接器接口包括分别用于建立与耳机，耳机或耳机的第一扬声器，麦克风和公共接地节点的相应电连接的第一端子，第二端子和第三端子。 第一功率放大器耦合到第一端子，以向耳机的第一扬声器提供第一音频输出信号。 第一开关装置包括第一接地开关，其被配置用于选择性地连接和断开耳机驱动器电路的第二端子和接地节点。 头戴式耳机驱动器电路还包括被配置为选择性地连接和断开第三端子和接地节点的第二接地开关。 耳机驱动器电路还包括差分前置放大器，例如。 麦克风前置放大器，被配置为产生麦克风输出电压，其中所述差分前置放大器包括耦合到所述第二端子的第一信号输入和耦合到所述连接器接口的第三端子的第二信号输入。 误差抑制电路被配置为在接地时或第三端接地时，检测或采样第二端的噪声或误差电压。 误差抑制电路还被配置为将感测或采样的噪声或误差电压加到预定的直流偏置电压上，并为连接器接口的未接地的第二和第三端子产生误差补偿的直流偏置电压。

    Method and system for transmitter linearization
    2.
    发明授权
    Method and system for transmitter linearization 失效
    发射机线性化的方法和系统

    公开(公告)号：US08237507B1

    公开(公告)日：2012-08-07

    申请号：US13047444

    申请日：2011-03-14

    Applicant: Ahmad Mirzaei ,  Hooman Darabi

    Inventor： Ahmad Mirzaei ,  Hooman Darabi

    IPC: H03F3/04

    CPC classification number: H03F1/3205 ,  H03F1/3211 ,  H03F3/211 ,  H03F3/45179 ,  H03F3/72 ,  H03F2200/357 ,  H03F2203/45541 ,  H03F2203/7236

    Abstract: Aspects of a method and system for transmitter linearization are provided. A signal may be amplified via one or more circuits comprising a first transistor having a first bias voltage applied to its gate via a resistor, and a second transistor having its source coupled to a first terminal of the resistor, its drain coupled to a second terminal of the resistor, and its gate coupled to a second bias voltage. The signal may be AC-coupled, via one or more capacitors, for example, to the gate of the first transistor. The first bias voltage and the second bias voltage may be such that the first transistor operates in the active region the second transistor operates in the subthreshold region. The effective channel width of the second transistor may be configurable during operation of the one or more circuits.

    Abstract translation: 提供发射机线性化的方法和系统的方面。 信号可以经由一个或多个电路被放大，该电路包括经由电阻器施加到其栅极的第一偏置电压的第一晶体管，以及其源极耦合到电阻器的第一端子的第二晶体管，其漏极耦合到第二端子 并且其栅极耦合到第二偏置电压。 信号可以经由一个或多个电容器例如AC耦合到第一晶体管的栅极。 第一偏置电压和第二偏置电压可以使得第一晶体管在有源区域中工作，第二晶体管在亚阈值区域中工作。 在一个或多个电路的操作期间，第二晶体管的有效沟道宽度可以是可配置的。

    Receiving circuit
    3.
    发明申请
    Receiving circuit 有权
    接收电路

    公开(公告)号：US20110169565A1

    公开(公告)日：2011-07-14

    申请号：US12929290

    申请日：2011-01-12

    Applicant: Wataru Nakamura

    Inventor： Wataru Nakamura

    IPC: H03F3/45

    CPC classification number: H03F3/45475 ,  H03F1/0266 ,  H03F3/45959 ,  H03F2200/27 ,  H03F2200/282 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2200/471 ,  H03F2203/45418 ,  H03F2203/45424 ,  H03F2203/45434 ,  H03F2203/45541 ,  H03F2203/45578 ,  H03F2203/45581 ,  H03F2203/45588 ,  H03F2203/45594 ,  H03F2203/45596

    Abstract: A receiving circuit in accordance with an exemplary aspect of the present invention includes a first voltage-dividing circuit that outputs a first input signal obtained by voltage division of one of differential signals based on the resistance ratio between first and second resistors, a second voltage-dividing circuit that outputs a second input signal obtained by voltage division of the other of the differential signals based on the resistance ratio between third and fourth resistors, a differential amplifier that amplifies the differential component between the first and second input signals, a common-mode voltage detection circuit that detects the common-mode voltage of the differential signals, and a bias voltage switching circuit that switches the voltage value of a bias voltage based on the common-mode voltage.

    Abstract translation: 根据本发明的示例性方面的接收电路包括：第一分压电路，其输出基于第一和第二电阻器之间的电阻比的差分信号中的一个分压获得的第一输​​入信号;第二电压 - 分压电路，输出基于第三和第四电阻器之间的电阻比对另一个差分信号进行分压而获得的第二输入信号;放大第一和第二输入信号之间的差分分量的差分放大器;共模 电压检测电路，其检测所述差分信号的共模电压;以及偏置电压切换电路，其基于所述共模电压来切换偏置电压的电压值。

    Adjustable differential input and output drivers
    5.
    发明授权
    Adjustable differential input and output drivers 有权
    可调差分输入和输出驱动器

    公开(公告)号：US07245144B1

    公开(公告)日：2007-07-17

    申请号：US11169242

    申请日：2005-06-27

    Applicant: Wilson Wong ,  Sergey Shumarayev

    Inventor： Wilson Wong ,  Sergey Shumarayev

    IPC: H03K17/16

    CPC classification number: 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

    Abstract: 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.

    Abstract translation: 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。

    AMPLIFIER
    8.
    发明申请
    AMPLIFIER 有权
    放大器

    公开(公告)号：US20150097619A1

    公开(公告)日：2015-04-09

    申请号：US14481042

    申请日：2014-09-09

    Applicant: FUJITSU LIMITED ,  FUJITSU SEMICONDUCTOR LIMITED

    Inventor： Yoichi Kawano ,  Shinji Yamaura

    IPC: H03F1/32

    CPC classification number: H03F1/32 ,  H03F1/0266 ,  H03F1/26 ,  H03F1/3205 ,  H03F1/3211 ,  H03F1/3276 ,  H03F1/565 ,  H03F3/245 ,  H03F3/45179 ,  H03F2200/165 ,  H03F2200/216 ,  H03F2200/246 ,  H03F2200/387 ,  H03F2201/3215 ,  H03F2203/45541 ,  H03F2203/45552 ,  H03F2203/45554 ,  H03F2203/45568 ,  H03F2203/45576

    Abstract: An amplifier includes two input terminals to receive a differential, two-tone transmission signal; two output terminals; a coil having terminals connected with the input terminals respectively, and a center tap; a first transistor having the gate connected with one terminal of the coil, and the output terminal connected with one output terminal; a second transistor having the gate connected with the other terminal of the coil, end the output terminal connected with the other output terminal; a diode having a terminal connected with the center tap; and a bias circuit connected with the other terminal of the diode to output a gate voltage to turn on the first and second transistors. The diode adjusts the terminal voltage depending on a signal level of a double harmonic wave of the transmission signal supplied to the terminal of the diode from the center tap.

    Abstract translation: 放大器包括两个输入端，用于接收差分双音传输信号; 两个输出端子; 具有分别与输入端子连接的端子的线圈和中心抽头; 第一晶体管，其栅极与线圈的一个端子连接，输出端子与一个输出端子连接; 具有与线圈的另一个端子连接的栅极的第二晶体管，使与另一个输出端子连接的输出端子端接; 具有与中心抽头连接的端子的二极管; 以及与二极管的另一个端子连接的偏置电路，以输出栅极电压以接通第一和第二晶体管。 二极管根据从中心抽头提供给二极管的端子的发送信号的双重谐波的信号电平来调整端子电压。

    DYNAMIC BIASING AMPLIFIER APPARATUS, DYNAMIC BIASING APPARATUS AND METHOD
    9.
    发明申请
    DYNAMIC BIASING AMPLIFIER APPARATUS, DYNAMIC BIASING APPARATUS AND METHOD 有权
    动态偏置放大器装置，动态偏置装置和方法

    公开(公告)号：US20080231372A1

    公开(公告)日：2008-09-25

    申请号：US11832653

    申请日：2007-08-02

    Applicant: Wei-Zen Chen ,  Dar-Huei Liao ,  Chih-Jen Yen

    Inventor： Wei-Zen Chen ,  Dar-Huei Liao ,  Chih-Jen Yen

    IPC: H03F3/04

    CPC classification number: H03F3/45475 ,  H03F1/0211 ,  H03F2200/78 ,  H03F2203/45541

    Abstract: A dynamic biasing amplifier apparatus, and dynamic biasing apparatus, and method are disclosed. The dynamic biasing amplifier apparatus includes a comparator unit, a dynamic bias generator unit, and an amplifier unit. The amplifier unit receives an input signal and output an output signal based on at least a bias voltage. The comparator unit compares the positive and negative input signals of the amplifier unit. The dynamic bias generator unit generates and adjusts the bias voltage in accordance with the comparing result of the comparator unit. Therefore, the dynamic bias generator unit controls the amplifier unit to operate in a low static current mode when the input signal is in steady state; and the dynamic bias generator unit controls the amplifier unit to operate in a high dynamic current mode when the input signal is in transition state.

    Abstract translation: 公开了一种动态偏置放大器装置和动态偏置装置及方法。 动态偏置放大器装置包括比较器单元，动态偏置发生器单元和放大器单元。 放大器单元接收输入信号并至少基于偏置电压输出输出信号。 比较器单元比较放大器单元的正和负输入信号。 动态偏置发生器单元根据比较器单元的比较结果生成和调整偏置电压。 因此，当输入信号处于稳定状态时，动态偏置发生器单元控制放大器单元在低静态电流模式下工作; 并且当输入信号处于转换状态时，动态偏置发生器单元控制放大器单元在高动态电流模式下工作。

    Method for transconductance linearization for DC-coupled applications
    10.
    发明申请
    Method for transconductance linearization for DC-coupled applications 有权
    直流耦合应用的跨导线性化方法

    公开(公告)号：US20070069816A1

    公开(公告)日：2007-03-29

    申请号：US11599247

    申请日：2006-11-14

    Applicant: Arya Behzad

    Inventor： Arya Behzad

    IPC: H03F3/45

    CPC classification number: H03F1/3211 ,  H03F1/26 ,  H03F3/45183 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/45288 ,  H03F2203/45541 ,  H03F2203/45564 ,  H03F2203/45581 ,  H03F2203/45594

    Abstract: A Class AB voltage-to-current converter includes a plurality of DC coupled transconductance stages that produce a linearized output and a biasing circuit. The biasing circuit generates a primary bias voltage that is greater than a generated secondary bias voltage. As such, the first transconductance stage becomes active before the second transconductance stage with respect to the magnitude of a differential input voltage, thereby allowing the transconductance of the secondary transconductance stage to be added (or subtracted) from the transconductance of the primary stage to improve the overall transconductance of the Class AB voltage-to-current converter. As each of the plurality of transconductance stages is biased differently from the others, the various transconductance stages are biased on to differing amounts based upon the biasing signals as well as the input signal.

    Abstract translation: AB类电压 - 电流转换器包括产生线性化输出和偏置电路的多个DC耦合跨导级。 偏置电路产生大于产生的次级偏置电压的初级偏置电压。 因此，第一跨导级相对于差分输入电压的幅度在第二跨导级之前变为有效，从而允许从初级级的跨导添加（或减去）次级跨导级的跨导，以改善 AB类电压 - 电流转换器的整体跨导。 由于多个跨导级中的每一个与其它跨导级的偏置不同，所以基于偏置信号以及输入信号将各种跨导级偏置到不同的量。

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