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    A DIGITAL-TO-ANALOG CONVERTER WITH NON-UNIFORM RESOLUTION
    21.
    发明申请
    A DIGITAL-TO-ANALOG CONVERTER WITH NON-UNIFORM RESOLUTION 审中-公开
    具有非均匀分辨率的数字 - 模拟转换器

    公开(公告)号：WO2012078922A2

    公开(公告)日：2012-06-14

    申请号：PCT/US2011064023

    申请日：2011-12-08

    Applicant: QUALCOMM INC ,  NARATHONG CHIEWCHARN ,  PARK JONG MIN ,  HUNG TSAI-PI

    Inventor： NARATHONG CHIEWCHARN ,  PARK JONG MIN ,  HUNG TSAI-PI

    IPC: H03M1/66

    CPC classification number: H03M1/66 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1265 ,  H03G11/008 ,  H03L7/093 ,  H03L7/099 ,  H03L2207/06 ,  H03M1/664 ,  H03M1/765

    Abstract: A circuit includes a digital-to-analog converter with non-uniform resolution for converting a digital signal into an analog signal. The digital-to-analog converter includes high-resolution circuitry, reduced-resolution circuitry coupled to the high-resolution circuitry and a switch coupled to the high-resolution circuitry and to the reduced-resolution circuitry. The switch couples one of the high-resolution circuitry and the reduced-resolution circuitry to an output node. The circuit also includes a decoder coupled to the switch. The decoder receives the digital signal to control the switch.

    Abstract translation: 电路包括具有非均匀分辨率的数模转换器，用于将数字信号转换为模拟信号。 数模转换器包括高分辨率电路，耦合到高分辨率电路的降低分辨率电路和耦合到高分辨率电路和降低分辨率电路的开关。 开关将高分辨率电路和降低分辨率电路中的一个耦合到输出节点。 该电路还包括耦合到开关的解码器。 解码器接收数字信号来控制开关。

    HIGH LINEAR FAST PEAK DETECTOR
    22.
    发明申请
    HIGH LINEAR FAST PEAK DETECTOR 审中-公开
    高线性快速探测器

    公开(公告)号：WO2011031540A2

    公开(公告)日：2011-03-17

    申请号：PCT/US2010046915

    申请日：2010-08-27

    Applicant: QUALCOMM INC ,  SU WENJUN ,  HADJICHRISTOS ARISTOTELE ,  CASSIA MARCO ,  NARATHONG CHIEWCHARN

    Inventor： SU WENJUN ,  HADJICHRISTOS ARISTOTELE ,  CASSIA MARCO ,  NARATHONG CHIEWCHARN

    IPC: G01R19/04

    CPC classification number: G01R19/04

    Abstract: A high linear fast peak detector having a variable bias current and/or a variable bias voltage is described. In an exemplary design, the peak detector includes a transistor, a variable current source, a capacitor, and a feedback circuit. The transistor receives the input signal and provides a source current. The variable current source receives the input signal, provides high bias current when the input signal is low, and provides low bias current when the input signal is high. The capacitor is charged by the source current when the input signal is high and is discharged by the high bias current when the input signal is low. The feedback circuit receives a detected signal from the capacitor and provides higher bias voltage for the transistor when the input signal is high, which results in higher source current from the transistor.

    Abstract translation: 描述具有可变偏置电流和/或可变偏置电压的高线性快速峰值检测器。 在示例性设计中，峰值检测器包括晶体管，可变电流源，电容器和反馈电路。 晶体管接收输入信号并提供源极电流。 可变电流源接收输入信号，当输入信号为低电平时提供高偏置电流，并且当输入信号为高电平时提供低偏置电流。 当输入信号为高电平时，电容器由电源电流充电，当输入信号为低电平时，电容器被高偏置电流放电。 当输入信号为高电平时，反馈电路接收来自电容器的检测信号，并为晶体管提供更高的偏置电压，这导致来自晶体管的较高的源极电流。

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