超聲波換能器作為一種實用的檢測手段，能實現(xiàn)聲波所攜帶的信息和電能之間轉(zhuǎn)換。它的性能優(yōu)良，價格低廉，操作方便，易于調(diào)試，因此在工農(nóng)業(yè)生產(chǎn)中發(fā)揮著重要的作用。但目前換能器驅(qū)動電路的發(fā)射頻率多為40 kHz，本文針對1 MHz的超聲波換能器電路進(jìn)行了設(shè)計，主要介紹了它的發(fā)射驅(qū)動電路和接收驅(qū)動電路的設(shè)計方案，并對它們的功能進(jìn)行了詳細(xì)地說明。最后搭建實驗平臺，并對電路的輸入、輸出模塊進(jìn)行了測試。實驗結(jié)果表明，換能器電路運行良好，可以為超聲波高精度測量領(lǐng)域的應(yīng)用提供參考。As a practical means of detection, ultrasonic transducer can realize the conversion between theinformation carried by sound wave and electric energy.It has the advantages of excellent performance,low cost, convenient operation and debugging, so plays an important role in industrial and agriculturalproduction.However, the transmitting frequency of the driving circuit for most transducer is 40 kHz.Thecircuit of 1 MHz ultrasonic transducer is designed In this paper. It mainly introduces the emissive drivingcircuit and the receiving circuit design and the detailed function of them. Finally, the experimentalplatform is built, and the circuit of input and output were tested. Experiments show that the transducer＇ s...
上傳時間： 2022-04-28
上傳用戶：
數(shù)字頻率計是電工電子中常用的測量儀器,數(shù)字頻率計通過用輸入待測信號對一特定長度的信號進(jìn)行計數(shù),從而得出頻率并通過數(shù)碼管直觀的顯示出來。本文提出了一種與輸入同步的數(shù)字頻率計的設(shè)計,提高了頻率計的精度,設(shè)計采用Multisim軟件進(jìn)行設(shè)計和仿真的過程,介紹了其工作原理,硬件電路設(shè)計和仿真的過程。設(shè)計采用了Multisim軟件進(jìn)行設(shè)計和仿真,設(shè)計結(jié)果得到的驗證。Digital frequency counter is used to measure the frequency of a signal.It is common to use a multivibrator to generate a standard 1 second time base signal and count input signal gated by this signal.However,the asynchronous of this time base signal with input signal will bring errors.In this paper,a high precision frequency counter which use synchronized time base signal generator is proposed.This frequency counter is designed and simulated by Multisim tools and result is verified.
標(biāo)簽： multisim
上傳時間： 2022-05-08
上傳用戶：
CH7525 is a low-cost, low-power semiconductor device that translates the DisplayPort signal to HDMI/DVI. This innovative DisplayPort receiver with an integrated HDMI Transmitter is specially designed to target the notebook/ultrabook, tablet device and PC market segments. Through the CH7525’s advanced decoding / encoding algorithm, the input DisplayPort high-speed serialized multimedia data can be seamlessly converted to HDMI/DVI output.
上傳時間： 2022-06-02
上傳用戶：
ATS2819/ATS2819P標(biāo)準(zhǔn)應(yīng)用方案主要分為以下功能模塊：Power Supply，BlueTooth，Audio Input/Output（包括codec、I2C、SPDIF），F(xiàn)M Receiver，disaplay（LED&LCD），USB，SPI NOR Flash Memory，SD/MMC/MS Card等。1.2原理圖設(shè)計總體原則1原理圖設(shè)計需要按照方案規(guī)格的要求實現(xiàn)各項硬件功能，盡量避免功能模塊相互間的資源沖突。如果存在I/O復(fù)用，接收復(fù)用等情況，除了需注意檢查I/O上電狀態(tài)，接口時序等，還需要注意復(fù)用的SIO工作頻率與工作電壓域是否符合要求(如WIO)，確保功能設(shè)計正確實現(xiàn)。2原理圖設(shè)計要求性能達(dá)到要求。如穩(wěn)定性，啟動電壓，功耗，ESD，EMI等。要注意檢查模塊電源開關(guān)狀態(tài)，選擇的原件標(biāo)稱及精度、材質(zhì)，接口保護(hù)元件和EMI濾波器等。3系統(tǒng)時鐘26MHZ，要求CL為7~9PF，精度為+-10PPM。這樣才能保證系統(tǒng)能正常工作。4當(dāng)設(shè)計PCB受限于模具大小時，各個模塊無法保證均能得到最優(yōu)的布局布線(如濾波電容要求靠近IC、走線上要求盡量少的過孔與盡可能短的走線)。因為在此給出一個模塊優(yōu)先級以供設(shè)計人員參考，從而提高方案設(shè)計的效率，增加一版work的可行性。將優(yōu)先級以阿拉伯?dāng)?shù)據(jù)排列
標(biāo)簽： ats2819 tws 藍(lán)牙音箱
上傳時間： 2022-06-07
上傳用戶：
ICN6201/02 is a bridge chip which receives MIPI? DSI inputs and sends LVDS outputs. MIPI? DSI supports up to 4 lanes and each lane operates at 1Gbps maximum; the totally maximum input bandwidth is 4Gbps; and the MIPI defined ULPS(ultra-low-power state) is also supported. ICN6201 decodes MIPI? DSI 18bepp RGB666 and 24bpp RGB888 packets.The LVDS output 18 or 24 bits pixel with 25MHz to 154MHz, by VESA or JEIDA format.ICN6201/02 support video resolution up to FHD (1920x1080) and WUXGA (1920x1200).ICN6201 adopts QFN48 package and ICN6202 adopts QFN40 package
標(biāo)簽： icn6202
上傳時間： 2022-06-10
上傳用戶：kingwide
【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
上傳時間： 2022-06-16
上傳用戶：canderile
說明：1，測試交流電源（Test AC Power Supply）：A.中國（China）：AC 220V+/-2%50Hz+/-2%B.美國（United States of America）：AC 120V+/-2%60Hz+/-2%。C.英國（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，測試溫度條件（Test Temperature Conditions）：25℃+/-2℃。3，測試以右聲道為準(zhǔn)（Standard Test Use Right Channell）4，信號由AUX插座輸入（Signal From AUX Jack Input）。5，測試以音量最大，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（Input 1 KHz Frequency Signal）B.左右聲道輸入信號測試右聲道（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
上傳時間： 2022-06-18
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.
上傳時間： 2022-06-20
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；
上傳時間： 2022-07-02
上傳用戶：xsr1983
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