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photodiodes

  • A souce code for a current to voltage converter used with photodiodes.

    A souce code for a current to voltage converter used with photodiodes.

    標簽： photodiodes converter current voltage

    上傳時間： 2017-04-27

    上傳用戶：陽光少年2016

  • 小面積和大面積光電二極管的低噪聲放大器

      photodiodes can be broken into two categories: largearea photodiodes with their attendant high capacitance(30pF to 3000pF) and smaller area photodiodes withrelatively low capacitance (10pF or less). For optimalsignal-to-noise performance, a transimpedance amplifi erconsisting of an inverting op amp and a feedback resistoris most commonly used to convert the photodiode currentinto voltage. In low noise amplifi er design, large areaphotodiode amplifi ers require more attention to reducingop amp input voltage noise, while small area photodiodeamplifi ers require more attention to reducing op amp inputcurrent noise and parasitic capacitances.

    標簽： 光電二極管 低噪聲放大器

    上傳時間： 2013-10-28

    上傳用戶：hanbeidang

  • 如何設計一個高效率的DC-DC轉換器

    Abstract: The DS1875 features a pulse-width modulation (PWM) controller that can be used to control aDC-DC converter. The DC-DC converter can then be used to generate the high bias voltages necessaryfor avalanche photodiodes (APDs). This application note describes the operation of a boost converterthat uses the DS1875. Discussion covers the selection of the inductor and switching frequency, and theselection of components that improve the efficiency of the converter. Test data are presented.

    標簽： DC-DC 如何設計 高效率 轉換器

    上傳時間： 2013-10-26

    上傳用戶：lyson

  • 雪崩光電二極管的偏置電壓和電流檢測電路

      Avalanche photodiodes (APDs) are widely utilized in laserbased fiberoptic systems to convert optical data intoelectrical form. The APD is usually packaged with a signalconditioning amplifier in a small module. An APD receivermodule and attendant circuitry appears in Figure 1. TheAPD module (figure right) contains the APD and a transimpedance(e.g., current-to-voltage) amplifier. An opticalport permits interfacing fiberoptic cable to the APD’sphotosensitive portion. The module’s compact constructionfacilitates a direct, low loss connection between theAPD and the amplifier, necessary because of the extremelyhigh speed data rates involved

    標簽： 雪崩 光電二極管 偏置電壓 電流檢測電路

    上傳時間： 2013-10-25

    上傳用戶：brain kung

  • 高電壓,低噪音,DCDC轉換器

      Photomultipliers (PMT), avalanche photodiodes (APD),ultrasonic transducers, capacitance microphones, radiationdetectors and similar devices require high voltage,low current bias. Additionally, the high voltage must bepristinely free of noise; well under a millivolt is a commonrequirement with a few hundred microvolts sometimesnecessary. Normally, switching regulator confi gurationscannot achieve this performance level without employingspecial techniques. One aid to achieving low noise is thatload currents rarely exceed 5mA. This freedom permitsoutput fi ltering methods that are usually impractical

    標簽： DCDC 高電壓 低噪音 轉換器

    上傳時間： 2013-10-28

    上傳用戶：lhw888

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