ExpressPCB 是一款免費的PCB設計軟件，簡單實使。可以畫雙層板。 Our Free PCB software is a snap to learn and use. For the first time, designing circuit boards is simple for the beginner and efficient for the professional. Our board manufacturing service makes top quality two and Four layer PCBs. Use our MiniBoard service and pay only $51 for three boards (plus $8 shipping).
標簽： ExpressPCB PCB 設計軟件
上傳時間： 2013-11-15
上傳用戶：lchjng
ExpressPCB 是一款免費的PCB設計軟件，簡單實使。可以畫雙層板。 Our Free PCB software is a snap to learn and use. For the first time, designing circuit boards is simple for the beginner and efficient for the professional. Our board manufacturing service makes top quality two and Four layer PCBs. Use our MiniBoard service and pay only $51 for three boards (plus $8 shipping).
標簽： ExpressPCB PCB 設計軟件
上傳時間： 2013-10-09
上傳用戶：1047385479
為了在CDMA系統中更好地應用QDPSK數字調制方式，在分析四相相對移相（QDPSK)信號調制解調原理的基礎上，設計了一種QDPSK調制解調電路，它包括串并轉換、差分編碼、四相載波產生和選相、相干解調、差分譯碼和并串轉換電路。在MAX+PLUSⅡ軟件平臺上，進行了編譯和波形仿真。綜合后下載到復雜可編程邏輯器件EPM7128SLC84-15中，測試結果表明，調制電路能正確選相，解調電路輸出數據與QDPSK調制輸入數據完全一致，達到了預期的設計要求。 Abstract: In order to realize the better application of digital modulation mode QDPSK in the CDMA system， a sort of QDPSK modulation-demodulation circuit was designed based on the analysis of QDPSK signal modulation-demodulation principles. It included serial/parallel conversion circuit, differential encoding circuit, Four-phase carrier wave produced and phase chosen circuit, coherent demodulation circuit, difference decoding circuit and parallel/serial conversion circuit. And it was compiled and simulated on the MAX+PLUSⅡ software platform,and downloaded into the CPLD of EPM7128SLC84-15.The test result shows that the modulation circuit can exactly choose the phase，and the output data of the demodulator circuit is the same as the input data of the QDPSK modulate. The circuit achieves the prospective requirement of the design.
上傳時間： 2013-10-28
上傳用戶：jyycc
The data plane of the reference design consists of a configurable multi-channel XBERT modulethat generates and checks high-speed serial data transmitted and received by the MGTs. Eachchannel in the XBERT module consists of two MGTs (MGTA and MGTB), which physicallyoccupy one MGT tile in the Virtex-4 FPGA. Each MGT has its own pattern checker, but bothMGTs in a channel share the same pattern generator. Each channel can load a differentpattern. The MGT serial rate depends on the reference clock frequency and the internal PMAdivider settings. The reference design can be scaled anywhere from one channel (two MGTs)to twelve channels (twenty-Four MGTs).
上傳時間： 2013-12-25
上傳用戶：jkhjkh1982
基于通用集成運算放大器，利用MASON公式設計了一個多功能二階通用濾波器，能同時或分別實現低通、高通和帶通濾波，也能設計成一個正交振蕩器。電路的極點頻率和品質因數能夠獨立、精確地調節。電路使用4個集成運放、2個電容和11個電阻，所有集成運放的反相端虛地。利用計算機仿真電路的通用濾波功能、極點頻率和品質因數的獨立控制和正交正弦振蕩，從而證明該濾波器正確有效。 Abstract: A new multifunctional second-order filter based on OPs was presented by MASON formula. Functions， such as high-pass， band-pass， low-pass filtering， can be realized respectively and simultaneously， and can become a quadrature oscillator by modifying resistance ratio. Its pole angular frequency and quality factor can be tuned accurately and independently. The circuit presented contains Four OPs， two capacitors， and eleven resistances， and inverting input of all OPs is virtual ground. Its general filtering， the independent control of pole frequency and quality factor and quadrature sinusoidal oscillation were simulated by computer， and the result shows that the presented circuit is valid and effective.
上傳時間： 2013-10-09
上傳用戶：13788529953
本書是關于設計的，多年來我一直從事這項工作。基本上說，從我第一次試著閱 讀《設計模式》（Gamma, Helm,Johnson & Vlissides, Addison-Wesley, 1995，通常 1 被稱作“四人幫 （Gang of Four）”或者 GOF）這本書開始。
標簽：
上傳時間： 2013-12-12
上傳用戶：luopoguixiong
The purpose of this computer program is to allow the user to construct, train and test differenttypes of artificial neural networks. By implementing the concepts of templates, inheritance andderived classes from C++ object oriented programming, the necessity for declaring multiple largestructures and duplicate attributes is reduced. Utilizing dynamic binding and memory allocationafforded by C++, the user can choose to develop Four separate types of neural networks:
標簽： differenttype construct computer purpose
上傳時間： 2013-12-06
上傳用戶：13517191407
基于simulink的uwb仿真 uwb.mdl: UWB model - open this to begin. uwb_lib.mdl: Library blocks for UWB model. uwb_init.m: Initialization called before model is loaded. uwb_settings: Sets up structure containing system parameters ( uwb in workspace). uwb_imr.m: Initializes UWB channel impulse response. uwb_sv_*.m: Four M-files used to generate channel impulse responses (MAT files).
上傳時間： 2013-12-22
上傳用戶：gengxiaochao
Title: STL Tutorial and Reference Guide: C++ Programming with the Standard Template Library (2nd Edition) Author: David R. Musser / Gillmer J. Derge / Atul Saini / Gilmer J. Derge Publisher: Addison-Wesley Page: 560 Edition: 2nd edition (March 27, 2001) Format: PDF Summary: The Standard Template Library was created as the first library of genetic algorithms and data structures, with Four ideas in mind: generic programming, abstractness without loss of efficiency, the Von Neumann computation model, and value semantics. This guide provides a tutorial, a description of each element of the library, and sample applications. The expanded second edition includes new code examples and demonstrations of the use of STL in real-world C++ software development it reflects changes made to STL for the final ANSI/ISO C++ language standard.
標簽： Programming Reference Standard Template
上傳時間： 2014-01-19
上傳用戶：netwolf
本文簡要介紹了集成電路MAX038的性能，并給出了以MAX038波形產生器為核心具有四種輸出波形的函數 信號發生器的設計方案。用這種方法設計的信號發生器具有結構簡單、成本低、體積小等特點，很好地滿足 了一般的實驗要求。 關鍵詞：集成電路 信號發生器 頻率 Abstract：The performance ofIC_MAX038 was introduced briefly in this paper．At the sa／ne time，a signal generator design making with integrated circuit MAX038 is provided，which can produce Four kinds of waveforms output．The signal generator was of characters such as simple structur，cheap expense，small volume and SO on．The signal generator contents the demand of general experiments very wel1． Key words：Integrated circuit Signal generator Frequency
上傳時間： 2013-12-12
上傳用戶：四只眼
