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    • 3. 发明申请
    • MULTI-MODE PHOTODETECTOR
    • 多模式光电转换器
    • US20120205522A1
    • 2012-08-16
    • US13368473
    • 2012-02-08
    • Justin RichardsonRobert Henderson
    • Justin RichardsonRobert Henderson
    • H01L31/107
    • H04N5/374H04N5/355H04N5/378
    • A photodetector includes a photodiode and output circuitry coupled to the photodiode. The photodetector is configurable for operation in at least two modes. A first configurable mode operates the photodetector as an integrating sensor. In this first mode, a bias voltage across the photodiode is set below the breakdown voltage of the photodiode and the output circuitry is configured to read an analog integration output voltage from the photodiode. A second configurable mode operates the photodetector as a single photon avalanche detector. In this second mode, the bias voltage across the photodiode is set above the breakdown voltage of the photodiode and the output circuitry is configured to read an avalanche output voltage.
    • 光电检测器包括耦合到光电二极管的光电二极管和输出电路。 光电检测器可配置为在至少两种模式下操作。 第一可配置模式将光电检测器作为积分传感器进行操作。 在该第一模式中,将光电二极管两端的偏置电压设置为低于光电二极管的击穿电压,并且输出电路被配置为从光电二极管读取模拟积分输出电压。 第二可配置模式将光电检测器操作为单个光子雪崩检测器。 在该第二模式中,将光电二极管两端的偏置电压设置在光电二极管的击穿电压之上,并且输出电路被配置为读取雪崩输出电压。
    • 10. 发明申请
    • Bit depth reduction for analog to digital conversion in global positioning system
    • 全球定位系统中模数转换的位深度削减
    • US20060125688A1
    • 2006-06-15
    • US10425271
    • 2003-04-29
    • Robert HendersonMark Asher
    • Robert HendersonMark Asher
    • G01S3/16G01S5/14
    • G01S19/21G01S19/37
    • Disclosed is a system and method for reducing a bit-depth requirement for an A/D converter in a GPS receiver having an antenna for receiving an analog input signal and a low noise amplifier for amplifying the input signal, comprising a filter for filtering about a bandwidth B the amplified signal; a down-conversion module centering the frequency of the filtered signal about a center frequency f0; an automatic gain controller (AGC) for setting a set point of the input signal; an adder for adding noise to the gain controlled signal, said noise based upon the bandwidth B and center frequency f0; and an analog to digital (A/D) converter for converting the added noise signal to a digital signal, wherein the noise added to the gain controlled signal reduces the bit depth requirement of the A/D converter.
    • 公开了一种用于减少具有用于接收模拟输入信号的天线和用于放大输入信号的低噪声放大器的GPS接收机中的A / D转换器的位深度要求的系统和方法,包括用于过滤关于 带宽B放大信号; 下变频模块以滤波信号的频率为中心,围绕中心频率f 0 <0; 用于设置输入信号的设定点的自动增益控制器(AGC); 用于将噪声加到增益控制信号的加法器,基于带宽B和中心频率f 0的所述噪声; 以及用于将附加的噪声信号转换为数字信号的模数(A / D)转换器,其中添加到增益控制信号的噪声降低了A / D转换器的位深度要求。