This document was developed under the Standard Hardware and Reliability Program (SHARP) TechnologyIndependent Representation of Electronic Products (TIREP) project. It is intended for use by VHSIC HardwareDescription Language (VHDL) design engineers and is offered as guidance for the development of VHDL modelswhich are compliant with the VHDL Data Item Description (DID DI-EGDS-80811) and which can be providedto manufacturing engineering personnel for the development of production data and the subsequent productionof hardware. Most VHDL modeling performed to date has been concentrated at either the component level orat the conceptual system level. The assembly and sub-assembly levels have been largely disregarded. Under theSHARP TIREP project, an attempt has been made to help close this gap. The TIREP models are based upon lowcomplexity Standard Electronic Modules (SEM) of the format A configuration. Although these modules are quitesimple, it is felt that the lessons learned offer guidance which can readily be applied to a wide range of assemblytypes and complexities.
上传时间： 2013-11-20
上传用户：pzw421125
各种功能的计数器实例（VHDL源代码）:ENTITY counters IS PORT ( d : IN INTEGER RANGE 0 TO 255; clk : IN BIT; clear : IN BIT; ld : IN BIT; enable : IN BIT; up_down : IN BIT; qa : OUT INTEGER RANGE 0 TO 255; qb : OUT INTEGER RANGE 0 TO 255; qc : OUT INTEGER RANGE 0 TO 255; qd : OUT INTEGER RANGE 0 TO 255; qe : OUT INTEGER RANGE 0 TO 255; qf : OUT INTEGER RANGE 0 TO 255; qg : OUT INTEGER RANGE 0 TO 255; qh : OUT INTEGER RANGE 0 TO 255; qi : OUT INTEGER RANGE 0 TO 255;
上传时间： 2013-10-09
上传用户：松毓336
集合式直流电能表（小功率的） 特点： 精确度0.05%满刻度±1位数 可同时量测与显示/直流电压/电流/瓦特（千瓦）/瓦特小时（千瓦小时） 电压输入（DC0-99.99V/0-600.0V）自动变档功能 显示范围0-9999(电流/瓦特/千瓦),0至99999999(八位數瓦特小时)可任意规划 数位RS-485 界面 (Optional) 主要规格： 辅助电源消耗功率：＜0.35VA(DC12V/DC24V) ＜0.5VA（DC48V） ＜1.5VA（AC90-240V(50/60Hz)） 精确度: 0.05% F.S. ±1 digit (23 ±5℃) 输入范围：Auto range(DC0-99.99V/0-600.0V(DC voltage)) 输入抗阻：＞5MΩ（DC voltage） 取样时间：10 cycles/second(total) 过载显示: " doFL " 显示值范围: 0-9999 digit（DCA/W(KW)） 0-9999999.999 digit(WH/(KWH)) RS-485传输速度: 19200/9600/4800/2400 selective RS-485通讯位址: "01"-"FF"（0-255） RS-485通信协议: Modbus RTU mode 温度系数: 50ppm/℃ (0-50℃) 显示幕:Bight Red LEDs high 10.16 mm(0.4") 参数设定方式: Touch switches 记忆方式: Non-volatile E²PROM memory 绝缘耐压能力:2KVac/1min.(input/output)（RS-485(Isolating)） 1600 Vdc (input/output) （RS-485(Isolating)） 使用环境条件: 0-50℃(20 to 90% RH non-condensed) 存放环境条件: 0-70℃(20 to 90% RH non-condensed) CE认证: EN 55022:1998/A1:2000 Class A EN 61000-3-2:2000 EN 61000-3-3:1995/A1:2001 EN 55024:1998/A1:2001
上传时间： 2013-11-20
上传用户：s363994250
Frequently, voltage reference stability and noise defi nemeasurement limits in instrumentation systems. In particular,reference noise often sets stable resolution limits.Reference voltages have decreased with the continuingdrop in system power supply voltages, making referencenoise increasingly important. The compressed signalprocessing range mandates a commensurate reductionin reference noise to maintain resolution. Noise ultimatelytranslates into quantization uncertainty in A to D converters,introducing jitter in applications such as scales, inertialnavigation systems, infrared thermography, DVMs andmedical imaging apparatus. A new low voltage reference,the LTC6655, has only 0.3ppm (775nV) noise at 2.5VOUT.Figure 1 lists salient specifi cations in tabular form. Accuracyand temperature coeffi cient are characteristic ofhigh grade, low voltage references. 0.1Hz to 10Hz noise,particularly noteworthy, is unequalled by any low voltageelectronic reference.
上传时间： 2013-10-30
上传用户：wxhwjf
Rotates an image by the angle degrees in the % CCW direction. Degrees may be any number. % The function will put degrees in the range 0 % to 360 degrees and then into a range of -45 to 45 % degrees after performing elementary 90 degree rotations.
标签： direction the Rotates Degrees
上传时间： 2013-12-10
上传用户：sardinescn
This program will ask how many numbers you want to find the average of, then it will allow you to enter your numbers(yes they can even be decimals) then it will calculate the mean, median, mode and range of what you enter.
上传时间： 2015-03-23
上传用户：skhlm
用于模拟时变非平稳的ARMA过程，根据Doppler频移和时变参数计算ARMA过程的系数，可以用来模拟非平稳的多径衰落信道
上传时间： 2015-04-17
上传用户：wfeel
The I2C Memory Model is a generic Proteus VSM model designed to model the timing and functionality of I2C memory devices from a wide range of manufacturers.
标签： model functionality designed Proteus
上传时间： 2015-04-25
上传用户：Divine
matlab NumMFs = 2 MF1= in3mf1 : gbellmf ,[3 2 -3 0] MF2= in3mf2 : gbellmf ,[3 2 3 0] [Input4] Name = in4 Range = [-3 3] NumMFs = 2 MF1= in4mf1 : gbellmf ,[3 2 -3 0] MF2= in4mf2 : gbellmf ,[3 2 3 0] [Output1] Name = out Range = [-10 10] NumMFs = 16 MF1= outmf1 : linear ,[41.3729301501 10.029755738 3.1622770253 4.2875458985
标签： gbellmf matlab NumMFs Input4
上传时间： 2015-04-28
上传用户：努力努力再努力
This book focuses primarily on XML itself. It covers the fundamental rules that all XML documents and authors must adhere to, whether a web designer uses SMIL to add animations to web pages or a C++ programmer uses SOAP to exchange serialized objects with a remote database. This book also covers generic supporting technologies that have been layered on top of XML and are used across a wide range of XML applications.
标签： fundamental XML documents primarily
上传时间： 2014-01-14
上传用户：zjf3110
