Trademarks: Trademarks and service marks of Cadence Design Systems, Inc. (Cadence) contained in
標簽: Allegro-Design-Editor-Tutorial_ad e_tut
上傳時間: 2014-08-09
上傳用戶:龍飛艇
基于CSMC的0.5 μmCMOS工藝,設計了一個高增益、低功耗、恒跨導軌到軌CMOS運算放大器,采用最大電流選擇電路作為輸入級,AB類結構作為輸出級。通過cadence仿真,其輸入輸出均能達到軌到軌,整個電路工作在3 V電源電壓下,靜態功耗僅為0.206 mW,驅動10pF的容性負載時,增益高達100.4 dB,單位增益帶寬約為4.2 MHz,相位裕度為63°。
上傳時間: 2013-11-04
上傳用戶:xlcky
提出了一種基于gm /ID方法設計的可變增益放大器。設計基于SMIC90nmCMOS工藝模型,可變增益放大器由一個固定增益級、兩個可變增益級和一個增益控制器構成。固定增益級對輸入信號預放大,以增加VGA最大增益。VGA的增益可變性由兩個受增益控制器控制的可變增益級實現。運用gm /ID的綜合設計方法,優化了任意工作范圍內,基于gm /ID和VGS關系的晶體管設計,實現了低電壓低功耗。為得到較寬的增益范圍,應用了一種新穎的偽冪指函數。利用Cadence中spectre工具仿真,結果表明,在1.2 V的工作電壓下,具有76 dB的增益,控制電壓范圍超過0.8 V,帶寬范圍從34 MHz到183.6 MHz,功耗為0.82 mW。
上傳時間: 2013-11-10
上傳用戶:笨小孩
Abstract: Many digital devices incorporate analog circuits. For instance, microprocessors, applicationspecificintegrated circuits (ASICs), and field-programmable gate arrays (FPGAs) may have internalvoltage references, analog-to-digital converters (ADCs) or digital-to-analog converters (DACs). However,there are challenges when you integrate more analog onto a digital design. As with all things in life, inelectronics we must always trade one parameter for another, with the application dictating the propertrade-off of analog function. In this application note, we examine how the demand for economy of spaceand cost pushes analog circuits onto digital substrates, and what design challenges emerge.
上傳時間: 2013-11-17
上傳用戶:菁菁聆聽
Quartus_II_11.0_x86破解器下載方法: 首先安裝Quartus II 11.0軟件(默認是32/64-Bit一起安裝): 用Quartus_II_11.0_x86破解器(內部版).exe破解C:\altera\11.0\quartus\bin下的sys_cpt.dll文件(運行Quartus_II_11.0_x86破解器(內部版).exe后,直接點擊“應用補丁”,如果出現“未找到該文件。搜索該文件嗎?”,點擊“是”,(如果直接把該破解器Copy到C:\altera\11.0\quartus\bin下,就不會出現這個對話框,而是直接開始破解!)然后選中sys_cpt.dll,點擊“打開”。安裝默認的sys_cpt.dll路徑是在C:\altera\11.0\quartus\bin下)。 把license.dat里的XXXXXXXXXXXX 用您老的網卡號替換(在Quartus II 11.0的Tools菜單下選擇License Setup,下面就有NIC ID)。 在Quartus II 11.0的Tools菜單下選擇License Setup,然后選擇License file,最后點擊OK。 注意:license文件存放的路徑名稱不能包含漢字和空格,空格可以用下劃線代替。 此軟件已經通過了諾頓測試,在其它某些殺毒軟件下,也許被誤認為是“病毒”,這是殺毒軟件智能化程度不夠的原因,所以只能暫時關閉之。
標簽: Quartus_II 11.0 86 破解
上傳時間: 2013-11-01
上傳用戶:hebmuljb
本設計通過采用分割電容陣列對DAC進行優化,在減小了D/A轉換開關消耗的能量、提高速度的基礎上,實現了一款采樣速度為1 MS/s的10-bit單端逐次逼近型模數轉換器。使用cadence spectre 工具進行仿真,仿真結果表明,設計的D/A轉換器和比較器等電路滿足10-bit A/D 轉換的要求,逐次逼近A/D轉換器可以正常工作。
上傳時間: 2013-11-21
上傳用戶:chukeey
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
schematic常用快捷鍵 x:檢查并存盤 s:存盤 [:縮小 ]:放大 F:整圖居中顯示 u:撤銷上一次操作 Esc:清楚剛鍵入的命令 c:復制 m:移動
上傳時間: 2013-11-21
上傳用戶:王楚楚
Designers of signal receiver systems often need to performcascaded chain analysis of system performancefrom the antenna all the way to the ADC. Noise is a criticalparameter in the chain analysis because it limits theoverall sensitivity of the receiver. An application’s noiserequirement has a signifi cant infl uence on the systemtopology, since the choice of topology strives to optimizethe overall signal-to-noise ratio, dynamic range andseveral other parameters. One problem in noise calculationsis translating between the various units used by thecomponents in the chain: namely the RF, IF/baseband,and digital (ADC) sections of the circuit.
上傳時間: 2014-12-05
上傳用戶:cylnpy
A complete design for a data acquisition card for the IBM PC is detailed in this application note. Additionally, C language code is provided to allow sampling of data at speed of more than 20kHz. The speed limitation is strictly based on the execution speed of the "C" data acquisition loop. A "Turbo" XT can acquire data at speeds greater than 20kHz. Machines with 80286 and 80386 processors can go faster than 20kHz. The computer that was used as a test bed in this application was an XT running at 4.77MHz and therefore all system timing and acquisition time measurements are based on a 4.77MHz clock speed.
上傳時間: 2013-10-29
上傳用戶:BOBOniu