Abstract: This design idea explains how to implement an 8-bit analog-to-digital converter (ADC), using a microcontroller
上傳時間： 2013-10-30
上傳用戶：愛死愛死
With more and more multi-frequency clocks being used in today's chips, especially in the communications field, it is often necessary to switch the source of a clock line while the chip is running.
上傳時間： 2013-10-10
上傳用戶：1214209695
Abstract: The DS4830 optical microcontroller's analog-to-digital converter (ADC) offset can change with temperature and gainselection. However, the DS4830 allows users to measure the ADC internal offset. The measured ADC offset is added to the ADCoffset register to nullify the offset error. This application note demonstrates the DS4830's ADC internal offset calibration in theapplication program.
上傳時間： 2014-12-23
上傳用戶：萍水相逢
Abstract: A laser module designer can use a fixed resistor, mechanical pot, digital pot, or a digital-to-analogconverter (DAC) to control the laser driver's modulation and bias currents. The advantages of a programmablemethod (POT or DAC) are that the manufacturing process can be automated and digital control can be applied(e.g., to compensate for temperature). Using POTs can be a more simple approach than a DAC. There can be aslight cost advantage to using a POT, but this is usually not significant relative to other pieces of the design.Using a DAC can offer advantages, including improved linearity (translating to ease of software implementationand ability to hit the required accuracy), increased board density, a wider range of resolutions, a betteroptimization range, ease of use with a negative voltage laser driver, and unit-to-unit consistency
上傳時間： 2013-11-13
上傳用戶：ca05991270
Abstract: This tutorial discusses methods for digitally adjusting the output voltage of a DC-DC converter. The digital adjustmentmethods are with a digital-to-analog converter (DAC), a trim pot (digital potentiometer), and PWM output of a microprocessor.Each method is assessed and several DACs and digital potentiometers presented.
上傳時間： 2013-11-20
上傳用戶：zycidjl
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).
上傳時間： 2014-12-23
上傳用戶：781354052
Abstract: This article discusses application circuits for Maxim force/sense digital-to-analog converters (DACs). Applications include:selectable fixed-gain DAC, programmable gain DAC, photodiode bias control, amperometric sensor control, digitally programmablecurrent source, Kelvin load sensing, temperature sensing, and high current DAC output. A brief description of the various DAC outputconfigurations is also given.
標簽： DAC
上傳時間： 2013-11-04
上傳用戶：youmo81
基于數字微鏡器件（Digital Micro-mirror Device，DMD）的哈達瑪變換光譜技術是一種新型的光譜成像技術，在國內很少有專門的文獻介紹[1-3]。文中先介紹了本實驗采用的哈達瑪光譜儀樣機的原理以及哈達瑪成像光譜儀優于傳統模板的獨特之處，即獲得多通道高能量高信噪比的光譜數據，然后描述對采集到的數據做高信噪比，高分辨率壓縮處理，最后說明此方法實時性強、圖像失真小、實用價值高、應用范圍廣。
上傳時間： 2013-11-25
上傳用戶：eastimage
Digital convergence, in recent history, has been prevalentin the consumer equipment domain and the designengineers in this area have been struggling with a plethoraof emerging standards and protocols. What lessons can welearn from their struggle? The same dilemmas now existin in-vehicle telematics and infotainment systems but withthe added issues of extremes of temperature, safety,security, and time in market.
上傳時間： 2014-12-23
上傳用戶：9牛10
在無線通信系統全面進入3G并開始邁向 4G的過程中，使用數字預失真技術（Digital Pre-distortion，以下簡稱DPD）對發射機的功放進行線性化是一門關鍵技術。功率放大器是通信系統中影響系統性能和覆蓋范圍的關鍵部件，非線性是功放的固有特性。非線性會引起頻譜增長(spectral re-growth)，從而造成鄰道干擾，使帶外雜散達不到協議標準規定的要求。非線性也會造成帶內失真，帶來系統誤碼率增大的問題。
上傳時間： 2013-10-19
上傳用戶：yy_cn
