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  • 利用數字電位器調整并校準升壓型DC-DC轉換器

    The purpose of this application note is to show an example of how a digital potentiometer can be used in thefeedback loop of a step-up DC-DC converter to provide calibration and/or adjustment of the output voltage.The example circuit uses a MAX5025 step-up DC-DC converter (capable of generating up to 36V,120mWmax) in conjunction with a DS1845, 256 position, NV digital potentiometer. For this example, the desiredoutput voltage is 32V, which is generated from an input supply of 5V. The output voltage can be adjusted in35mV increments (near 32V) and span a range wide enough to account for resistance, potentiometer and DCDCconverter tolerances (27.6V to 36.7V).

    標簽: DC-DC 數字電位器 升壓型 校準

    上傳時間: 2014-12-23

    上傳用戶:781354052

  • 精密DAC和看門狗提高模擬輸出安全

    Abstract: Using a DAC and a microprocessor supervisor, the system safety can be improved in industrial controllers, programmablelogiccontrollers (PLC), and data-acquisition systems. The analog output is set to zero-scale (or pin-programmable midscale) when amicroprocessor failure, optocoupler failure, or undervoltage condition occurs. A simple application is shown on how to implement thisfunction.

    標簽: DAC 精密 看門狗 模擬

    上傳時間: 2013-10-17

    上傳用戶:sjb555

  • XAPP854-數字鎖相環(DPLL)參考設計

    Many applications require a clock signal to be synchronous, phase-locked, or derived fromanother signal, such as a data signal or another clock. This type of clock circuit is important in

    標簽: XAPP DPLL 854 數字鎖相環

    上傳時間: 2014-12-23

    上傳用戶:qq21508895

  • 意法半導體運放穩定性

      Who has never experienced oscillations issues when using an operational amplifier? Opampsare often used in a simple voltage follower configuration. However, this is not the bestconfiguration in terms of capacitive loading and potential risk of oscillations.Capacitive loads have a big impact on the stability of operational amplifier-basedapplications. Several compensation methods exist to stabilize a standard op-amp. Thisapplication note describes the most common ones, which can be used in most cases.The general theory of each compensation method is explained, and based on this, specific

    標簽: 半導體 運放 穩定性

    上傳時間: 2013-10-28

    上傳用戶:chenbhdt

  • 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

  • DN454 單端至差分放大器設計技巧

      A fully differential amplifi er is often used to converta single-ended signal to a differential signal, a designwhich requires three signifi cant considerations: theimpedance of the single-ended source must match thesingle-ended impedance of the differential amplifi er,the amplifi er’s inputs must remain within the commonmode voltage limits and the input signal must be levelshifted to a signal that is centered at the desired outputcommon mode voltage.

    標簽: 454 DN 單端 差分放大器

    上傳時間: 2013-11-09

    上傳用戶:wweqas

  • 諧振器論文精選.rar

    Control systems are becoming increasingly dependent on digital processing and so require sensors able to provide direct digital inputs. Sensors based on time measurement, having outputs based on a frequency or phase, have an advantage over conventional analogue sensors in that their outputs can be measured directly in digital systems by pulse counting.

    標簽: 諧振器 論文

    上傳時間: 2013-10-08

    上傳用戶:wuyuying

  • LTC1062的低通濾波器應用

    Highlights the LTC1062 as a lowpass filter in a phase lock loop. Describes how the loop's bandwidth can be increased and the VCO output jitter reduced when the LTC1062 is the loop filter. Compares it with a passive RC loop filter. Also discussed is the use of LTC1062 as simple bandpass and bandstop filter.

    標簽: 1062 LTC 低通濾波器

    上傳時間: 2013-10-24

    上傳用戶:chens000

  • Delta Sigma的ADC橋測量技術

      Sensors for pressure, load, temperature, acceleration andmany other physical quantities often take the form of aWheatstone bridge. These sensors can be extremely linearand stable over time and temperature. However, mostthings in nature are only linear if you don’t bend them toomuch. In the case of a load cell, Hooke’s law states that thestrain in a material is proportional to the applied stress—as long as the stress is nowhere near the material’s yieldpoint (the “point of no return” where the material ispermanently deformed).

    標簽: Delta Sigma ADC 測量技術

    上傳時間: 2013-11-13

    上傳用戶:墻角有棵樹

  • T2060_T2170打印頭安裝步驟

    Submission must be made within 10 days after the printhead upgrade.Failure to do so will void the 12-month warranty by TallyGenicom.

    標簽: 2060 2170 打印頭

    上傳時間: 2013-11-22

    上傳用戶:DXM35

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