【例3.1]4位全加器module adder 4(cout,sum i na,i nb,cin);output[3:0]sum output cout;input[3:0]i na,i nb;input cin;assign(cout,suml=i na +i nb+ci n;endmodule【例3.2]4位計(jì)數(shù)器module count 4(out,reset,clk);output[3:0]out;input reset,cl k;regl 3:01 out;always@posedge clk)
標(biāo)簽: verilog
上傳時(shí)間: 2022-06-16
上傳用戶:canderile
說明:1,測(cè)試交流電源(Test AC Power Supply):A.中國(guó)(China):AC 220V+/-2%50Hz+/-2%B.美國(guó)(United States of America):AC 120V+/-2%60Hz+/-2%。C.英國(guó)(Britain):AC 240V+/-2%50Hz+/-2%D.歐洲(Europe):AC 230V+/-2%50Hz+/-2%E.日本(Japan):AC 100V+/-2%60Hz+/-2%F.墨西哥(Mexico):AC 127V+/-2%60Hz+/-2%2,測(cè)試溫度條件(Test Temperature Conditions):25℃+/-2℃。3,測(cè)試以右聲道為準(zhǔn)(Standard Test Use Right Channell)4,信號(hào)由AUX插座輸入(Signal From AUX Jack Input)。5,測(cè)試以音量最大,音調(diào)和平衡在中央位置(電子音調(diào)在正常狀態(tài))。(Test Volume Setup Max,Equalizer And Balance Setup Center)。6,標(biāo)準(zhǔn)輸出(Standard Output):A.輸入1 KHz頻率信號(hào)(Input 1 KHz Frequency Signal)B.左右聲道輸入信號(hào)測(cè)試右聲道(L&R Input Signal Test Use R Channel)C.額定輸出功率満(Rating Output Power Full)10 W,標(biāo)準(zhǔn)輸出定為1w.(Rating Output Power Full 10 w,Standard Output Setup 1 W)D.額定輸出功率1W到10w,標(biāo)準(zhǔn)輸出定為500 mW(Rating Output Power 1 W To 10 W,Standard Output Setup 500 mW)E.額定輸出功率小于1w,標(biāo)準(zhǔn)輸出定為50 mW(Rating Output Power Not Full 1 W,Standard Output Setup 50 mW)F.標(biāo)準(zhǔn)輸出電壓以V-VPR為準(zhǔn)(Standard Output Voltage Use V-V/PR)。G.V-V/PR中P為額定輸出功率,R為喇叭標(biāo)稱阻抗。
標(biāo)簽: 音響功放
上傳時(shí)間: 2022-06-18
上傳用戶:
隨著個(gè)人通信和移動(dòng)通信技術(shù)在世界范圍內(nèi)的迅猛發(fā)展,人們對(duì)移動(dòng)通信的服務(wù)質(zhì)量要求也越來越高.WCDMA(Wideband Code Division Multiple Access)作為第三代移動(dòng)通信系統(tǒng)的三大標(biāo)準(zhǔn)之一,因?yàn)榫哂袃?yōu)良的通信質(zhì)量和較高的頻譜利用率而被廣泛應(yīng)用.在WCDMA接收機(jī)中,射頻前端電路占有重要的地位,其性能優(yōu)劣直按影響著接收機(jī)的接收靈敏度以及后繼信號(hào)處理部分的性能.因此,進(jìn)行WCDMA射頻電路的研究和設(shè)計(jì)具有重要的現(xiàn)實(shí)意義.天線和低噪聲放大器(LNA)是射頻(RF)接收機(jī)芯片的重要組成部分。本文在廣泛查閱國(guó)內(nèi)、外參考文獻(xiàn)的基礎(chǔ)上,對(duì)微帶天線的寬頻帶技術(shù)和LNA的設(shè)計(jì)原理進(jìn)行了深入地研究.綜合多種寬頻帶技術(shù),本文采用L形探針饋電與雙E形槽貼片相結(jié)合的方法,提出了一款適合于WCDMA基站的寬頻帶微帶天線結(jié)構(gòu)。利用電磁仿真軟件HFSS對(duì)該天線的性能進(jìn)行了研究,研究了天線貼片尺寸對(duì)天線性能的影響。在此基礎(chǔ)上,優(yōu)化設(shè)計(jì)了適用于WCDMA基站的寬頻帶微帶天線,并對(duì)其進(jìn)行了加工、測(cè)試和分析,仿真和測(cè)試結(jié)果均表明,該天線-10dB回波損耗帶寬為520MHz,天線在2GHz的增益為7.88dBi,滿足WCDMA基站的要求.另外,本文還根據(jù)WCDMA基站對(duì)LNA性能的要求,利用仿真軟件ADS(Advanced Design System)設(shè)計(jì)了一款高線性的兩級(jí)平衡低噪聲放大器,給出了電路原理圖,并制作了版圖,結(jié)果表明,該低噪聲放大器在1.92GH2~1.98GHz頻段增益不低于30dB,噪聲系數(shù)小于1dB,滿足WCDMA的要求,具有一定的實(shí)用價(jià)值。
上傳時(shí)間: 2022-06-20
上傳用戶:
INTRODUCTION In the past, adding speech recording and playback capability to a product meant using a digital signal processor or a specialized audio chip. Now, using a simplified Adaptive Differential Pulse Code Modulation(ADPCM) algorithm, these audio capabilities can be added to any PICmicro device. This application note will cover the ADPCM compression and decompression algorithms, performance comparison of all PICmicro devices, and an application using a PIC16C72 micro-controller.DEFINITION OF TERMS step size -value of the step used for quantization of ana-log signals and inverse quantization of a number of steps.quantization -the digital form of an analog input signal is represented by a finite number of steps.adaptive quantization -the step size of a quantizer is dramatically changed with time in order to adapt to a changing input signal.inverse quantizer -a finite number of steps is converted into a digital representation of an analog signal.
上傳時(shí)間: 2022-06-20
上傳用戶:
0引言當(dāng)今國(guó)際上有影響的現(xiàn)場(chǎng)總線標(biāo)準(zhǔn)很多,眾多的現(xiàn)場(chǎng)總線標(biāo)準(zhǔn)給控制系統(tǒng)的集成帶來不便,使得各廠商生產(chǎn)的現(xiàn)場(chǎng)總線產(chǎn)品難以集成在一起,實(shí)現(xiàn)互可操作。在現(xiàn)場(chǎng)總線難以統(tǒng)一的情況下,以太網(wǎng)在工業(yè)自動(dòng)化和過程控制領(lǐng)域獲得了迅速增長(zhǎng)。當(dāng)前,不少?gòu)S商都為其生產(chǎn)的PLC及其遠(yuǎn)程1/0提供與以太網(wǎng)相連的接口和功能,提供把PLC和以太網(wǎng)相結(jié)合的產(chǎn)品,將基于TCP/IP協(xié)議開發(fā)的以太網(wǎng)與PLC控制器相結(jié)合,就可以構(gòu)筑全分散、全開放的工業(yè)控制系統(tǒng)。1局域網(wǎng)技術(shù)與以太網(wǎng)局域網(wǎng)分布距離短,具有短小靈活和結(jié)構(gòu)規(guī)整的特點(diǎn),容易形成標(biāo)準(zhǔn),因此局域網(wǎng)技術(shù)是計(jì)算機(jī)網(wǎng)絡(luò)技術(shù)中最為標(biāo)準(zhǔn)化的一部分。國(guó)際電子電工工程師協(xié)會(huì)IEEE在70年代就制定了3個(gè)局域網(wǎng)標(biāo)準(zhǔn)IEEE802.3(CSMA/CD).IEEE802.4< 牌總S).ПEEE802.5(令牌).UkAtIEEE802.3(CS-MA/CD)的一個(gè)典型產(chǎn)品,即一般把符合IEEE802.3的特定實(shí)現(xiàn)稱為以太網(wǎng)。其中,CSMA/CD是Carrier Sense Multiple Access With Colli-sion Detection的縮寫,含有兩方面的內(nèi)容:載波偵聽(CSMA)和沖突檢測(cè)(CD),CSMA/CD訪問控制方式主要用于總線形和樹形網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu),基帶傳輸系統(tǒng)。信息傳輸是以“包”為單位,簡(jiǎn)稱信包。
標(biāo)簽: plc 以太網(wǎng) 上位機(jī) 通信
上傳時(shí)間: 2022-06-23
上傳用戶:
Introduction The Sil9135/Sil9135A HDMI Receiver with Enhanced Audio and Deep Color Outputs is a second-generation dual-input High Definition Multimedia Interface(HDMI)receiver. It is software-compatible with the Sil9133receiver, but adds audio support for DTS-HD and Dolby TrueHD. Digital televisions that can display 10-or 12-bit color depth can now provide the highest quality protected digital audio and video over a single cable. The Sil9135and Sil9135A devices, which are functionally identical, can receive Deep Color video up to 12-bit,1080p @60Hz. Backward compatibility with the DVI 1.0specification allows HDMI systems to connect to existing DVI 1.0 hosts, such as HD set-top boxes and PCs. Silicon Image HDMI receivers use the latest generation Transition Minimized Differential Signaling(TMDS) core technology that runs at 25-225 MHz.The chip comes pre-programmed with High-bandwidth?
上傳時(shí)間: 2022-06-25
上傳用戶:
#nclude<reg51.h>#include<intrins.h>#銷nclude<math.h>#include<string.h>struct PID{unsigned int SetPoint;//設(shè)定目標(biāo) Desired Value unsigned int Proportion;//比例常數(shù)Proportional Const unsigned int integral;//積分常數(shù)Integral Const unsigned int Derivative://微分常數(shù)Derivative Const unsigned int LastError;//Emorl-1]unsigned int PrevError;//Errorl-2]unsigned int SumError;//Sums of Errors struct PID spid;//PID Control Structure unsigned int rout;//PID Response(Output)unsigned int rin://PID Feedback(Input)sbit data1=P100;sbit clk=P141;sbit plus=P240;sbit subs=P241:sbit stop=P22;sbit output=P34;sbit DQ=P33;unsigned char flag,flag_1=0;unsigned char high_time,low_time,.count=0,/占空比調(diào)節(jié)參數(shù)unsigned char set_temper=35;unsigned char temper;unsigned chari:unsigned charj=0;unsigned ints;
上傳時(shí)間: 2022-07-02
上傳用戶:xsr1983
摘要:本系統(tǒng)以ICL8038集成塊為核心器件,制作一種函數(shù)信號(hào)發(fā)生器,制作成本較低。適合學(xué)生學(xué)習(xí)電子技術(shù)測(cè)量使用。ICL8038是一種具有多種波形輸出的精密振蕩集成電路,只需要個(gè)別的外部元件就能產(chǎn)生從0.001Hz~30KlHz的低失真正弦波、三角波、矩形波等脈沖信號(hào)。輸出波形的頻率和占空比還可以由電流或電阻控制。另外由于該芯片具有調(diào)制信號(hào)輸入端,所以可以用來對(duì)低頻信號(hào)進(jìn)行頻率調(diào)制。關(guān)鍵詞:函數(shù)信號(hào)發(fā)生器頻率調(diào)制Abstract:The system ICL8038 integrated block as the core device,producing a kind of function signal generator,producing low cost.Suitable for students to learn the use of electronic technology measurement.ICL8038 is a kind of multi-precision oscillator waveform output integrated circuits,a separate external components only need to be able to generate from the 0.001Hz ~30KHz low-distortion sine wave,triangle wave,square wave pulse signal,etc..Output waveform of the frequency and duty cycle can also be controlled by a currentor resistance.In addition,as the chip has a modulated signal input terminal,it can be used to low-frequency signal is frequency modulation.
標(biāo)簽: icl8038 函數(shù)發(fā)生器 電路
上傳時(shí)間: 2022-07-04
上傳用戶:zhanglei193
NCS8803 3.2.1 功能:是一顆將HDMI信號(hào)轉(zhuǎn)EDP信號(hào)的轉(zhuǎn)接芯片。其應(yīng)用如下: 3.2.2產(chǎn)品特征 輸入:HDMI 輸出:Embedded-DisplayPort (eDP) EDP接口 1/2/4-lane eDP @ 1.62/2.7Gbps per lane HD to WQXGA (2560*1600) supported 內(nèi)置EDP協(xié)議 HDMI Input HDMI 1.4a supported 支持RGB444/YCbCr444/YCbCr422 像素時(shí)鐘: 340MHz 支持雙通道音頻輸入; 參考時(shí)鐘 任何頻率,在19MHz到100MHz之間,單端時(shí)鐘輸入 內(nèi)置5000 ppm SSC與否 通信方式 IIC 電源 1.2V core supply 2.5V or 3.3V IO supply 功耗:150Mw 封裝:QFN-56 (7mm x 7mm) 3.2.4 應(yīng)用產(chǎn)品:廣告機(jī),平板、醫(yī)療器械、車機(jī)、顯示器、小電視、車載電視等 3.2.5 應(yīng)用平臺(tái):RK、全志、M-star、炬力等 3.3.6 推廣注意事項(xiàng)A:確認(rèn)客戶使用屏的分辨率,最常用的是1366x768@60Hz和1920x1080@60Hz BNCS8803支持4-lane DP / eDP輸出通常支持WQXGA所需 (2560 * 1600)及以上60 hz的幀速率 C.確認(rèn)客戶的信號(hào)源,要是標(biāo)準(zhǔn)的HDMI信號(hào),其他的都不行; D.此芯片支持縮放功能,分?jǐn)?shù)縮放比例2:1至1:2; E、此芯片不是純硬件轉(zhuǎn)換芯片,需要通過IIC或者SPI進(jìn)行初始化,初始化一般使用客戶CPU進(jìn)行,這樣方便控制時(shí)序也節(jié)省成本,如果不使用客戶CPU進(jìn)行初始化就要另外加MCU進(jìn)行配置。 設(shè)計(jì)注意事項(xiàng): A、NCS8801S設(shè)計(jì)的時(shí)候要特別注意輸入輸出的走線問題,要做好屏蔽以免信號(hào)受到干擾。 B、注意電源濾波 C、設(shè)計(jì)的時(shí)候預(yù)留LVDS信號(hào)要預(yù)留阻抗匹配電阻 D、設(shè)計(jì)的時(shí)候復(fù)位腳最好由客戶CPU的GPIO口進(jìn)行控制,以便控制整個(gè)方案的時(shí)序,避免后面出現(xiàn)問題。
上傳時(shí)間: 2022-07-08
上傳用戶:
MT7688 family integrates a 1T1R 802.11n Wi-Fi radio,a 580MHz MIPS? 24KEcTM CPU,1-port fast Ethernet PHY, USB2.0 host, PCIe, SD-XC,I2S/PCM and multiple slow IOs. MT7688 provides two operation modes-IoT gateway mode and IoT device mode. In IoT gateway mode, the PCI Express interface can connect to 802.1lac chipset for 1lac dual-band concurrent gateway. The high performance USB2.0 allows MT7688 to add 3G/LTE modem support or add a H.264 ISP for wireless IP camera. For the IoT device mode, MT7688 supports eMC, SD-XC and USB 2.0. MT7688 can support the Wifi high quality audio via 192Kbps/24bits I2S interface and VolP application through PCM. In IoT device mode, it further supports PWM, SPI slave,3d UARI and more GPIOs. For IoT gateway, it canl connect to touch panel and BLE, Zigbee/Z-Wave and sub-1G RF for smart home control.
上傳時(shí)間: 2022-07-24
上傳用戶:
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