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天線的好書《antenna toolkit》

·目錄1. Radio signals on the move 12. Antenna basics 193. Wire, connection, grounds, and all that 494. Marconi and other unbalanced antennas 695. Doublets, dipoles, and other Hertzian antennas 876. Limit

標簽： antenna toolkit nbsp 天線

上傳時間： 2013-06-14

上傳用戶：lingduhanya
AAC音頻解碼算法程序

·詳細說明：AAC音頻解碼算法程序-AAC audio frequency decoding algorithm procedure 文件列表: AAC_Codec .........\daac.01.11.12 .........\.............\all.h .........\.............\audio_out.cp

標簽： AAC 音頻解碼算法程序

上傳時間： 2013-05-26

上傳用戶：wangchong
AAC Encoder

·文件列表: aacenc.h aac_qc.c aac_qc.h aac_se_enc.c aac_se_enc.h all.h bitstream.c bitstream.h block.h COPYING dolby_def.h

標簽： Encoder nbsp AAC

上傳時間： 2013-07-01

上傳用戶：1966640071
Vivado白皮書

針對未來十年的 “All-Programmable”器件的顛覆之作

標簽： Vivado 白皮書

上傳時間： 2013-04-24

上傳用戶：hgy9473
Protel99se鼠標增強軟件2.0

Protel99se鼠標增強軟件2.0: 2.0版本改名為“Protel99se鼠標增強軟件”，是因為使用普通三鍵鼠標也可實現放大和縮小功能。 1.0版本功能：(軟件名稱：“Protel99se增加鼠標滾輪放大縮小功能”) 向上滾動滾輪 --> Zoom In 放大（PageUp鍵）向下滾動滾輪 --> Zoom Out 縮小（PageDown鍵）單擊中鍵 --> Zoom Pan 移動屏幕 (Home鍵) 2.0版本新增功能： 1.在手動布局時，按鼠標左鍵移動元件時，再點擊右鍵，可旋轉元件。（非常好用的功能） 2.增加鼠標中鍵手形功能，按住中鍵，移動鼠標，放開中鍵，為一個手形功能。按中鍵向左移動 --> 在畫線時退回上一步（退格鍵）按中鍵向右移動 --> 刪除有焦點的對象（Delete鍵）按中鍵向上移動 --> 放置元件時，進入修改元件屬性（Tab鍵）按中鍵向下移動 --> 放置元件時，用于旋轉元件（空格鍵）按中鍵向左上移動 --> Zoom Out 縮小（PageDown鍵）按中鍵向右下移動 --> Zoom In 放大（PageUp鍵）按中鍵向右上移動 --> Clear 刪除所有選擇的對象（Ctrl+Delete鍵）按中鍵向左下移動 --> Fit All Objects 顯示所有元件（Ctrl+PageDown鍵） 3.在PCB、SCH、PCBLib、SCHLib四個編輯器中都能實現本軟件的所有功能。

標簽： Protel 2.0 99 se

上傳時間： 2013-07-02

上傳用戶：電子世界
Verilog Coding Style for Efficient Digital Design

In this paper, we discuss efficient coding and design styles using verilog. This can beimmensely helpful for any digital designer initiating designs. Here, we address different problems rangingfrom RTL-Gate Level simulation mismatch to race conditions in writing behavioral models. All theseproblems are accompanied by an example to have a better idea, and these can be taken care off if thesecoding guidelines are followed. Discussion of all the techniques is beyond the scope of this paper, however,here we try to cover a few of them.

標簽： Efficient Verilog Digital Coding

上傳時間： 2013-11-22

上傳用戶：han_zh
模擬IC性能的權衡模擬到數字化設計的挑戰

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.

標簽： 模擬IC 性能模擬數字化設計

上傳時間： 2013-11-17

上傳用戶：菁菁聆聽
RF至數字接收器的信號鏈噪聲分析

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.

標簽： 數字接收器信號鏈噪聲分析

上傳時間： 2014-12-05

上傳用戶：cylnpy
LTC1099基于PC的數據采集板實現

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.

標簽： 1099 LTC 數據采集板

上傳時間： 2013-10-29

上傳用戶：BOBOniu
PCI ExpressTM Architecture

PCI ExpressTM Architecture Add-in Card Compliance Checklist for the PCI Express Base 1.0a SpecificationThe PCI Special Interest Group disclaims all warranties and liability for the use of this document and the information contained herein and assumes no responsibility for any errors that may appear in this document, nor does the PCI Special Interest Group make a commitment to update the information contained herein.Contact the PCI Special Interest Group office to obtain the latest revision of this checklistQuestions regarding the ths document or membership in the PCI Special Interest Group may be forwarded tPCI Special Interest Group5440 SW Westgate Drive #217Portland, OR 97221Phone: 503-291-2569Fax: 503-297-1090 DISCLAIMERThis document is provided "as is" with no warranties whatsoever, including any warranty of merchantability, noninfringement, fitness for any particular purpose, or any warranty otherwise arising out of any proposal, specification, or sample. The PCI SIG disclaims all liability for infringement of proprietary rights, relating to use of information in this specification. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted herein.

標簽： Architecture ExpressTM PCI

上傳時間： 2013-11-03

上傳用戶：gy592333