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    ADAPTIVE BIAS CURRENT GENERATION FOR SWITCHED-CAPACITOR CIRCUITS
    1.
    发明申请
    ADAPTIVE BIAS CURRENT GENERATION FOR SWITCHED-CAPACITOR CIRCUITS 有权
    用于开关电容电路的自适应偏置电流产生

    公开(公告)号：US20100026542A1

    公开(公告)日：2010-02-04

    申请号：US12185046

    申请日：2008-08-01

    Applicant: Chuanyang Wang ,  Xiaohong Quan ,  Seyfollah Bazarjani

    Inventor： Chuanyang Wang ,  Xiaohong Quan ,  Seyfollah Bazarjani

    IPC: H03M1/12

    CPC classification number: H03F1/303 ,  H03F3/005 ,  H03F3/195 ,  H03F3/45188 ,  H03F2200/357 ,  H03F2200/447 ,  H03F2200/451 ,  H03M3/354 ,  H03M3/392 ,  H03M3/43 ,  H03M3/454

    Abstract: Techniques for adaptively generating bias current for a switched-capacitor circuit are described. The switched-capacitor circuit charges and discharges at least one switching capacitor at a sampling rate and may be a ΣΔ ADC that digitizes an analog signal at the sampling rate and provides digital samples. The switched-capacitor circuit may support multiple modes associated with different sampling rates. A bias circuit generates a bias current for the switched-capacitor circuit to be proportional to the sampling rate for a selected mode, to provide a bandwidth proportional to the sampling rate for an operational transconductance amplifier (OTA) within the switched-capacitor circuit, and to track changes in the switching capacitor(s) due to variations in integrated circuit (IC) process and temperature. The settling time of the switched-capacitor circuit may track with the multiple modes and across IC process and temperature variations.

    Abstract translation: 描述用于自适应地产生开关电容器电路的偏置电流的技术。 开关电容电路以一个采样速率对至少一个开关电容器进行充电和放电，并且可以是以采样速率对模拟信号进行数字化并提供数字采样的SigmaDelta ADC。 开关电容器电路可以支持与不同采样率相关联的多种模式。 偏置电路产生用于开关电容器电路的偏置电流与所选模式的采样率成比例，以提供与开关电容器电路内的工作跨导放大器（OTA）的采样率成比例的带宽，以及 以跟踪由于集成电路（IC）工艺和温度的变化而导致的开关电容器的变化。 开关电容器电路的稳定时间可以跟踪多种模式，并跨过IC工艺和温度变化。

    Adaptive bias current generation for switched-capacitor circuits
    2.
    发明授权
    Adaptive bias current generation for switched-capacitor circuits 有权
    开关电容电路的自适应偏置电流产生

    公开(公告)号：US07750837B2

    公开(公告)日：2010-07-06

    申请号：US12185046

    申请日：2008-08-01

    Applicant: Chuanyang Wang ,  Xiaohong Quan ,  Seyfollah Bazarjani

    Inventor： Chuanyang Wang ,  Xiaohong Quan ,  Seyfollah Bazarjani

    IPC: H03M1/12

    CPC classification number: H03F1/303 ,  H03F3/005 ,  H03F3/195 ,  H03F3/45188 ,  H03F2200/357 ,  H03F2200/447 ,  H03F2200/451 ,  H03M3/354 ,  H03M3/392 ,  H03M3/43 ,  H03M3/454

    Abstract: Techniques for adaptively generating bias current for a switched-capacitor circuit are described. The switched-capacitor circuit charges and discharges at least one switching capacitor at a sampling rate and may be a ΣΔ ADC that digitizes an analog signal at the sampling rate and provides digital samples. The switched-capacitor circuit may support multiple modes associated with different sampling rates. A bias circuit generates a bias current for the switched-capacitor circuit to be proportional to the sampling rate for a selected mode, to provide a bandwidth proportional to the sampling rate for an operational transconductance amplifier (OTA) within the switched-capacitor circuit, and to track changes in the switching capacitor(s) due to variations in integrated circuit (IC) process and temperature. The settling time of the switched-capacitor circuit may track with the multiple modes and across IC process and temperature variations.

    Abstract translation: 描述用于自适应地产生开关电容器电路的偏置电流的技术。 开关电容电路以一个采样率对至少一个开关电容器进行充电和放电，并且可以是＆amp; ADC以采样率数字化模拟信号，并提供数字采样。 开关电容器电路可以支持与不同采样率相关联的多种模式。 偏置电路产生用于开关电容器电路的偏置电流与所选模式的采样率成比例，以提供与开关电容器电路内的工作跨导放大器（OTA）的采样率成比例的带宽，以及 以跟踪由于集成电路（IC）工艺和温度的变化而导致的开关电容器的变化。 开关电容器电路的稳定时间可以跟踪多种模式，并跨过IC工艺和温度变化。

    Apparatus configured for applying write signals for driving a write head and method for configuring
    3.
    发明授权
    Apparatus configured for applying write signals for driving a write head and method for configuring 有权
    被配置为用于施加用于驱动写入头的写入信号的装置和用于配置的方法

    公开(公告)号：US06927933B2

    公开(公告)日：2005-08-09

    申请号：US10405386

    申请日：2003-04-02

    Applicant: Davy H. Choi ,  Chuanyang Wang

    Inventor： Davy H. Choi ,  Chuanyang Wang

    IPC: G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B19/04

    CPC classification number: G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B2005/0005 ,  G11B2005/0013

    Abstract: An apparatus configured according to characteristics for driving a write head to write to a memory device includes: (a) a current directing circuit directing a write current through a first circuit path or a second including the write head in response to a first or second write signal; (b) at least one of: (1) an impedance system for including at least one impedance unit within each of the first and second current paths; and (2) a current system for including at least one circuit element between a locus at each end of said write head and a supply voltage; and (c) a control unit coupled with at least one of the impedance system and the current system for effecting the including for at least one of the impedance system and the current system to effect configuring the apparatus.

    Abstract translation: 根据用于驱动写入头以写入存储器件的特性配置的装置包括：（a）电流引导电路，响应于第一或第二写入而引导写入电流通过第一电路路径或包括写入头的写入电流 信号; （b）至少一个：（1）阻抗系统，用于在第一和第二电流路径的每一个内包括至少一个阻抗单元; 和（2）用于在所述写入头的每一端的轨迹和电源电压之间包括至少一个电路元件的电流系统; 以及（c）与所述阻抗系统和所述当前系统中的至少一个耦合的控制单元，用于实现所述阻抗系统和所述当前系统中的至少一个的包括用于实现所述装置的配置。

    AC Coupling Techniques For Video Drivers
    8.
    发明申请
    AC Coupling Techniques For Video Drivers 审中-公开
    视频驱动器的交流耦合技术

    公开(公告)号：US20080204601A1

    公开(公告)日：2008-08-28

    申请号：US11677811

    申请日：2007-02-22

    Applicant: Chuanyang Wang ,  Francisco Ledesma ,  Alexander Herve Reyes

    Inventor： Chuanyang Wang ,  Francisco Ledesma ,  Alexander Herve Reyes

    IPC: H04N5/16

    CPC classification number: H04N5/16

    Abstract: A low bandwidth signal path is added to copy internal node DC signal to output node. Therefore, for a DC or low frequency signal, the output signal is controlled by this loop. On the other hand, a high frequency signal is not affected because of the low-bandwidth of added loop. Thus, both DC and AC coupling modes are realized for components such as low-voltage video drivers.

    Abstract translation: 添加低带宽信号路径以将内部节点DC信号复制到输出节点。 因此，对于直流或低频信号，输出信号由该回路控制。 另一方面，由于加入循环的低带宽，高频信号不受影响。 因此，对于诸如低电压视频驱动器的部件，实现了DC和AC耦合模式。

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