protel 99se 元件庫 Protel DXP 元件庫目錄 Protel DXP常用元件庫 Protel DXP典型實例教程 Protel99SE精彩教程
上傳時間： 2014-01-20
上傳用戶：kang1923
畢業設計 USB TO Gigabit LAN 網卡 隨著網絡技術飛速發展，多媒體的應用越來越多，人們對網絡的要求也越來越高，為了適應市場的需求，網卡出現了。它以其結構簡單、成本低廉、兼容性強等諸多的優越性得到了廣泛的應用。由于網絡的應用越來越廣泛，網卡的應用也越來越多、功能越來越強大。開始時由于技術方面的限制，網卡只有10Mbps的吞吐量，由于網絡技術的發展，100Mbps吞吐量的網卡開始在市場上得到廣泛的應用。而現在1000Mbps吞吐量的網卡的出現又給網絡的傳輸帶來了新的活力。 論文中主要闡述了基于以太網的USB TO Gigabit LAN網卡的設計與制作。論文首先對以太網進行了介紹，緊接著講了網卡的基本知識。隨后又對USB TO Gigabit LAN網卡的電路設計和制作進行了詳細的描述。論文還包括了USB TO Gigabit LAN網卡的調試等內容。
上傳時間： 2014-12-02
上傳用戶：wab1981
PROTEUS元件名稱中英對照
上傳時間： 2013-10-28
上傳用戶：黑漆漆
庫元件名稱集
上傳時間： 2013-10-29
上傳用戶：pol123
元件對照表，【中英文】
上傳時間： 2013-11-25
上傳用戶：assef
為解決傳統可視倒車雷達視頻字符疊加器結構復雜，可靠性差，成本高昂等問題，在可視倒車雷達設計中采用視頻字符發生器芯片MAX7456。該芯片集成了所有用于產生用戶定義OSD，并將其插入視頻信號中所需的全部功能，僅需少量的外圍阻容元件即可正常工作。給出了以MAX7456為核心的可視倒車雷達的軟、硬件實現方案及設計實例。該方案具有電路結構簡單、價格低廉、符合人體視覺習慣的特點。經實際裝車測試，按該方案設計的可視倒車雷達視場清晰、提示字符醒目、工作可靠，可有效降低駕駛員倒車時的工作強度、減少倒車事故的發生。 Abstract: A new video and text generation chip，MAX7456，was used in the design of video parking sensor in order to simplify system structure，improve reliability and reduce cost. This chip included all the necessary functions to generate user-defined OSDs and to add them into the video signals. It could be put into work with addition of just a small number of resistances and capacitors. This paper provided software and hardware implementation solutions and design example based on the chip. The system had the characteristics of simplicity in circuit structure，lower cost，and comfort for the nature of human vision. Loading road test demonstrates high video and text display quality and reliable performance，which makes the driver easy to see backward and reduces chance of accidents.
上傳時間： 2013-12-10
上傳用戶：qiaoyue
介紹一種基于C8051F340快速單片機控制的直放站設計；采用GPS同步法，按時隙功率控制，自動增益控制AGC環路，系統的非線性指標良好、抗干擾性強、可靠性高。比以功率檢測的同步方法和基于特征窗搜索的同步方法實現簡單，應用范圍更廣，可用于任何無線直放站應用場合，特別適用于干放及無線射頻交換場合。
上傳時間： 2013-10-15
上傳用戶：hanhanhan
PICKIT™ 2 PROGRAMMER-TO-GO USER GUIDE The PICkit 2 Programmer-To-Go functionality allows a PIC MCU memory image to be downloaded into the PICkit 2 unit for later programming into a specific PIC MCU. No software or PC is required to program devices once the PICkit 2 unit is set up for Programming-To-Go. A USB power source for the PICkit 2 is all that is needed.
標簽： PROGRAMMER-TO PICKIT 8482
上傳時間： 2013-10-29
上傳用戶：ca05991270
The PCA9541 is a 2-to-1 I2C-bus master selector designed for high reliability dual masterI2C-bus applications where system operation is required, even when one master fails orthe controller card is removed for maintenance. The two masters (for example, primaryand back-up) are located on separate I2C-buses that connect to the same downstreamI2C-bus slave devices. I2C-bus commands are sent by either I2C-bus master and are usedto select one master at a time. Either master at any time can gain control of the slavedevices if the other master is disabled or removed from the system. The failed master isisolated from the system and will not affect communication between the on-line masterand the slave devices on the downstream I2C-bus.
上傳時間： 2013-10-09
上傳用戶：3294322651
The MAX3243E device consists of three line drivers, five line receivers, and a dual charge-pump circuit with±15-kV ESD (HBM and IEC61000-4-2, Air-Gap Discharge) and ±8-kV ESD (IEC61000-4-2, Contact Discharge)protection on serial-port connection pins. The device meets the requirements of TIA/EIA-232-F and provides theelectrical interface between an asynchronous communication controller and the serial-port connector. Thiscombination of drivers and receivers matches that needed for the typical serial port used in an IBM PC/AT, orcompatible. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-Vsupply. In addition, the device includes an always-active noninverting output (ROUT2B), which allowsapplications using the ring indicator to transmit data while the device is powered down. The device operates atdata signaling rates up to 250 kbit/s and a maximum of 30-V/ms driver output slew rate.
標簽： MULTICHANNEL 5.5 TO RS
上傳時間： 2013-10-19
上傳用戶：ddddddd
