設計了一種用于高速ADC中的高速高增益的全差分CMOS運算放大器。主運放采用帶開關電容共模反饋的折疊式共源共柵結構，利用增益提高和三支路電流基準技術實現一個可用于12~14 bit精度，100 MS/s采樣頻率的高速流水線（Pipelined）ADC的運放。設計基于SMIC 0.25 μm CMOS工藝，在Cadence環境下對電路進行Spectre仿真。仿真結果表明，在2.5 V單電源電壓下驅動2 pF負載時，運放的直流增益可達到124 dB，單位增益帶寬720 MHz，轉換速率高達885 V/μs，達到0.1%的穩定精度的建立時間只需4 ns，共模抑制比153 dB。
上傳時間： 2014-12-23
上傳用戶：jiiszha
上傳時間： 2013-11-21
上傳用戶：zgz317
為了幫助廣大電子愛好者了解、掌握AV功放的電路結構、工作原理和維修特點，本刊特約有關作者編寫了“AV功放原理與維修”的講座，擬就AV功放的前置處理電路、卡拉OK電路、杜比定向邏輯解碼器、DSP和SRS聲場處理電路、熒光屏顯示與驅動電路、頻譜均衡控制與顯示電路、電源電路、遙控與微電腦控制電路、功率放大電路的原理與AV功放維修方面的問題與大家交流。歡迎廣大讀者關注并參與探討。
上傳時間： 2013-11-01
上傳用戶：wanqunsheng
描述了數字電位器工作原理、特點、分類及廣泛應用，闡述了與機械電位器相比，數字電位器的優點，同時也描述了數字電位器AD5272內部電路結構，在此基礎上進一步提出了對數字電位器AD5272應用電路系統的設計。結果表明，在低成本的前提下，將數字電位器的性能及應用充分展示，同時驗證了數字電位器更為經濟實用。
標簽： 數字電位器
上傳時間： 2013-10-18
上傳用戶：huang111
介紹了廣泛應用于各種電流模式電路的第二代電流控制電流傳輸器原件的跨導線性環特性和端口特性，以及其基本組成共源共柵電流鏡，并提出了基于共源共柵電流鏡的新型COMS電流傳輸器。在此基礎上，設計了基于電流控制電流傳輸器的電流模式積分電路，并利用Hspice軟件進行輸入為正弦波和方波時的輸出波形的仿真驗證。
上傳時間： 2013-10-22
上傳用戶：wtrl
Abstract: Mechanical misalignment and scaling factors lead to a mismatch between the values coming from a touchscreen panel (as translated by a touch screen controller) and the display (typically an LCD) on which the touch screenpanel is mounted. This tutorial discusses how to calibrate the touch screen panel to match the display.
上傳時間： 2013-10-21
上傳用戶：euroford
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: A perfect voltage reference produces a stable voltage independent of any external factors. Real-world voltagereferences, of course, are subject to errors caused by many external factors. One causeof these major errors istemperature. Without care, it is easy to operate a voltage reference outside its operating temperature range. Thisapplication note describes how references respond to temperature changes, and how self-heating can cause a voltagereference to operate outside its recommended temperature range. Once understood, this knowledge can then be used toavoid making this design error.
上傳時間： 2013-11-08
上傳用戶：xianglee
Abstract: Specifications such as noise, effective number of bits (ENOB), effective resolution, and noise-free resolution inlarge part define how accurate an ADC really is. Consequently, understanding the performance metrics related to noise isone of the most difficult aspects of transitioning from a SAR to a delta-sigma ADC. With the current demand for higherresolution, designers must develop a better understanding of ADC noise, ENOB, effective resolution, and signal-to-noiseratio (SNR). This application note helps that understanding.
上傳時間： 2013-10-16
上傳用戶：x18010875091
Abstract: The MAX9930–MAX9933 family of RF controllers and detector can be used in a wide variety of applications. Anideal application is cable television (CATV) over fiber, where either a RF controller or a RF detector controls the gain of atransimpedance amplifier (TIA). This application note shows how the MAX9930 (RF controller) can be used as either theRF controller or detector.
上傳時間： 2013-10-11
上傳用戶：Pzj
