-
Singular value decomposition filter for speckle reduction in adaptive ultrasound imagingHasegawa_2019_Jpn._J._Appl._Phys._58_SGGE06
標簽:
decomposition
ultrasound
reduction
Singular
adaptive
speckle
imaging
filter
value
for
上傳時間:
2020-06-04
上傳用戶:mengdeming
-
A power semiconductor module is basically a power circuit of different
materials assembled together using hybrid technology, such as semiconduc-
tor chip attachment, wire bonding, encapsulation, etc. The materials
involved cover a wide range from insulators, conductors, and semiconduc-
tors to organics and inorganics. Since these materials all behave differently
under various environmental, electrical, and thermal stresses, proper selec-
tion of these materials and the assembly processes are critical. In-depth
knowledge of the material properties and the processing techniques is there-
fore required to build a high-performance and highly reliable power module.
標簽:
Manufacture
Electronic
Modules
Design
Power
上傳時間:
2020-06-07
上傳用戶:shancjb
-
stract
With global drivers such as better energy
consumption, energy efficiency and reduction of
greenhouse gases, CO 2 emission reduction has become
key in every layer of the value chain. Power Electronics
has definitely a role to play in these thrilling challenges.
From converters down to compound semiconductors,
innovation is leading to breakthrough technologies. Wide
BandGap, Power Module Packaging, growth of Electric
Vehicle market will game change the overall power
electronic industry and supply chain. In this presentation
we will review power electronics trends, from
technologies to markets.
標簽:
Electronics
Materials
Power
WBG
for
上傳時間:
2020-06-07
上傳用戶:shancjb
-
lm75A溫度數字轉換器 FPGA讀寫實驗Verilog邏輯源碼Quartus工程文件+文檔資料,FPGA為CYCLONE4系列中的EP4CE6E22C8. 完整的工程文件,可以做為你的學習設計參考。LM75A 是一個使用了內置帶隙溫度傳感器和模數轉換技術的溫度數字轉換器。它也是一個溫度檢測器,可提供一個過熱檢測輸出。LM75A 包含許多數據寄存器:配置寄存器用來存儲器件的某些配置,如器件的工作模式、OS 工作模式、OS 極性和OS 故障隊列等(在功能描述一節中有詳細描述);溫度寄存器(Temp),用來存儲讀取的數字溫度;設定點寄存器(Tos & Thyst),用來存儲可編程的過熱關斷和滯后限制,器件通過2 線的串行I2C 總線接口與控制器通信。LM75A 還包含一個開漏輸出(OS),當溫度超過編程限制的值時該輸出有效。LM75A 有3 個可選的邏輯地址管腳,使得同一總線上可同時連接8個器件而不發生地址沖突。LM75A 可配置成不同的工作條件。它可設置成在正常工作模式下周期性地對環境溫度進行監控或進入關斷模式來將器件功耗降至最低。OS 輸出有2 種可選的工作模式:OS 比較器模式和OS 中斷模式。OS 輸出可選擇高電平或低電平有效。故障隊列和設定點限制可編程,為了激活OS 輸出,故障隊列定義了許多連續的故障。溫度寄存器通常存放著一個11 位的二進制數的補碼,用來實現0.125℃的精度。這個高精度在需要精確地測量溫度偏移或超出限制范圍的應用中非常有用。正常工作模式下,當器件上電時,OS 工作在比較器模式,溫度閾值為80℃,滯后75℃,這時,LM75A就可用作一個具有以上預定義溫度設定點的獨立的溫度控制器。module LM75_SEG_LED ( //input input sys_clk ,input sys_rst_n ,inout sda_port ,//output output wire seg_c1 ,output wire seg_c2 ,output wire seg_c3 ,output wire seg_c4 ,output reg seg_a ,output reg seg_b ,output reg seg_c ,output reg seg_e ,output reg seg_d ,output reg seg_f ,output reg seg_g ,output reg seg_h , output reg clk_sclk );//parameter define parameter WIDTH = 8;parameter SIZE = 8;//reg define reg [WIDTH-1:0] counter ;reg [9:0] counter_div ;reg clk_50k ;reg clk_200k ;reg sda ;reg enable ;
標簽:
lm75a
數字轉換器
fpga
verilog
上傳時間:
2021-10-27
上傳用戶:
-
FPGA采樣AD9238數據并通過VGA波形顯示例程 Verilog邏輯源碼Quartus工程文件+文檔說明,FPGA型號Cyclone4E系列中的EP4CE6F17C8,Quartus版本17.1。ADC 模塊型號為 AN9238,最大采樣率 65Mhz,精度為12 位。實驗中把 AN9238 的 2 路輸入以波形方式在 HDMI 上顯示出來,我們可以用更加直觀的方式觀察波形,是一個數字示波器雛形。module top( input clk, input rst_n, output ad9238_clk_ch0, output ad9238_clk_ch1, input[11:0] ad9238_data_ch0, input[11:0] ad9238_data_ch1, //vga output output vga_out_hs, //vga horizontal synchronization output vga_out_vs, //vga vertical synchronization output[4:0] vga_out_r, //vga red output[5:0] vga_out_g, //vga green output[4:0] vga_out_b //vga blue);wire video_clk;wire video_hs;wire video_vs;wire video_de;wire[7:0] video_r;wire[7:0] video_g;wire[7:0] video_b;wire grid_hs;wire grid_vs;wire grid_de;wire[7:0] grid_r;wire[7:0] grid_g;wire[7:0] grid_b;wire wave0_hs;wire wave0_vs;wire wave0_de;wire[7:0] wave0_r;wire[7:0] wave0_g;wire[7:0] wave0_b;wire wave1_hs;wire wave1_vs;wire wave1_de;wire[7:0] wave1_r;wire[7:0] wave1_g;wire[7:0] wave1_b;wire adc_clk;wire adc0_buf_wr;wire[10:0] adc0_buf_addr;wire[7:0] adc0_bu
標簽:
fpga
ad9238
上傳時間:
2021-10-27
上傳用戶:qingfengchizhu
-
FPGA讀寫SD卡讀取BMP圖片通過LCD顯示例程實驗 Verilog邏輯源碼Quartus工程文件+文檔說明,FPGA型號Cyclone4E系列中的EP4CE6F17C8,Quartus版本17.1。1 實驗簡介在前面的實驗中我們練習了 SD 卡讀寫,VGA 視頻顯示等例程,本實驗將 SD 卡里的 BMP 圖片讀出,寫入到外部存儲器,再通過 VGA、LCD 等顯示。本實驗如果通過液晶屏顯示,需要有液晶屏模塊。2 實驗原理在前面的實驗中我們在 VGA、LCD 上顯示的是彩條,是 FPGA 內部產生的數據,本實驗將彩條替換為 SD 內的 BMP 圖片數據,但是 SD 卡讀取速度遠遠不能滿足顯示速度的要求,只能先寫入外部高速 RAM,再讀出后給視頻時序模塊顯示module top( input clk, input rst_n, input key1, output [5:0] seg_sel, output [7:0] seg_data, output vga_out_hs, //vga horizontal synchronization output vga_out_vs, //vga vertical synchronization output[4:0] vga_out_r, //vga red output[5:0] vga_out_g, //vga green output[4:0] vga_out_b, //vga blue output sd_ncs, //SD card chip select (SPI mode) output sd_dclk, //SD card clock output sd_mosi, //SD card controller data output input sd_miso, //SD card controller data input output sdram_clk, //sdram clock output sdram_cke, //sdram clock enable output sdram_cs_n, //sdram chip select output sdram_we_n, //sdram write enable output sdram_cas_n, //sdram column address strobe output sdram_ras_n, //sdram row address strobe output[1:0] sdram_dqm, //sdram data enable output[1:0] sdram_ba, //sdram bank address output[12:0] sdram_addr, //sdram address inout[15:0] sdram_dq //sdram data);parameter MEM_DATA_BITS = 16 ; //external memory user interface data widthparameter ADDR_BITS = 24
標簽:
fpga
上傳時間:
2021-10-27
上傳用戶:
-
基于TMS320F2812 光伏并網發電模擬裝置PROTEL設計原理圖+PCB+軟件源碼+WORD論文文檔,硬件采用2層板設計,PROTEL99SE 設計的工程文件,包括完整的原理圖和PCB文件,可以做為你的學習設計參考。 摘要:本文實現了一個基于TMS320F2812 DSP芯片的光伏并網發電模擬裝置,采用直流穩壓源和滑動變阻器來模擬光伏電池。通過TMS320F2812 DSP芯片ADC模塊實時采樣模擬電網電壓的正弦參考信號、光伏電池輸出電壓、負載電壓電流反饋信號等。經過數據處理后,用PWM模塊產生實時的SPWM 波,控制MOSFET逆變全橋輸出正弦波。本文用PI控制算法實現了輸出信號對給定模擬電網電壓的正弦參考信號的頻率和相位跟蹤,用恒定電壓法實現了光伏電池最大功率點跟蹤(MPPT),從而達到模擬并網的效果。另外本裝置還實現了光伏電池輸出欠壓、負載過流保護功能以及光伏電池輸出欠壓、過流保護自恢復功能、聲光報警功能、孤島效應的檢測、保護與自恢復功能。系統測試結果表明本設計完全滿定設計要求。關鍵詞:光伏并網,MPPT,DSP Photovoltaic Grid-connected generation simulator Zhangyuxin,Tantiancheng,Xiewuyang(College of Electrical Engineering, Chongqing University)Abstract: This paper presents a photovoltaic grid-connected generation simulator which is based on TMS320F2812 DSP, with a DC voltage source and a variable resistor to simulate the characteristic of photovoltaic cells. We use the internal AD converter to real-time sampling the referenced grid voltage signal, outputting voltage of photovoltaic, feedback outputting voltage and current signal. The PWM module generates SVPWM according to the calculation of the real-time sampling data, to control the full MOSFET inverter bridge output sine wave. We realized that the output voltage of the simulator can track the frequency and phase of the referenced grid voltage with PI regulation, and the maximum photovoltaic power tracking with constant voltage regulation, thereby achieved the purpose of grid-connected simulation. Additionally, this device has the over-voltage and over-current protection, audible and visual alarm, islanding detecting and protection, and it can recover automatically. The testing shows that our design is feasible.Keywords: Photovoltaic Grid-connected,MPPT,DSP 目錄引言 11. 方案論證 11.1. 總體介紹 11.2. 光伏電池模擬裝置 11.3. DC-AC逆變橋 11.4. MOSFET驅動電路方案 21.5. 逆變電路的變頻控制方案 22. 理論分析與計算 22.1. SPWM產生 22.1.1. 規則采樣法 22.1.2. SPWM 脈沖的計算公式 32.1.3. SPWM 脈沖計算公式中的參數計算 32.1.4. TMS320F2812 DSP控制器的事件管理單元 42.1.5. 軟件設計方法 62.2. MPPT的控制方法與參數計算 72.3. 同頻、同相的控制方法和參數計算 8
標簽:
tms320f2812
光伏
并網發電
模擬
protel
pcb
上傳時間:
2021-11-02
上傳用戶:
-
CH340C+RT9013+MINI USB接口板 AD設計硬件原理圖+PCB文件,ALTIUM設計的2層板設計,包括完整的原理圖和PCB文件,主要器件如下:Library Component Count : 12Name Description----------------------------------------------------------------------------------------------------CAP CapacitorCC2640EM CC2630 ModuleCH340 CH340 USB 2 UARTCON11 Connector 11pinsCON12 Connector 12pinsCON3X2 Connector 5*2LED LEDRES ResistorRT9013 RT9013 3.3VSWITCH switch 6*6USB1 USB ConnectorsXDS110-Lte XDS110-Lite Target Interface
標簽:
ch340c
rt9013
usb
接口
ad設計
上傳時間:
2021-11-24
上傳用戶:canderile
-
STM32L475開發板PDF原理圖+AD集成3D封裝庫+主要器件技術手冊,集成封裝庫型號列表如下:Library Component Count : 44Name Description----------------------------------------------------------------------------------------------------ANT-2.4G ANT,2.4G,PCB天線ATK-TEST-1*4-2.54mm 測試點ATK_MODULE 單排母,1*6,2.54mmBEEP 3.3V有源蜂鳴器BUTTON_DIP3 撥動開關SS-12F44C-0402-SMD C-0603-SMD C-CAP-SMD-220uF/10V C-CEP-220uF/16V D-1N4148 Header-1*3-2.54mm 單排針-2.54mmHeader-2*10-2.54mm 雙排針-2.54mmHeader-2*2-2.54mm 雙排針-2.54mmHeader-2*3-2.54mm 雙排針-2.54mmHeader-2*4-2.54mm 雙排座-2.54mmIR-LED 1206紅外發射管(側)IR-LF0038GKLL-1 紅外接收管SMDJ-MICRO-USB-5S Micro USB 5.9有柱腳長1.25加長針L-0420-4.7uH 電感,4.7uH,3ALCD-TFT-H13TS38A LCD,TFT,1.3'240*240,禹龍LED-0603-RED 發光二極管-紅色LED-RGB-1615-0603 RGB,共陽,1615,0603MIC-6022 MICMotor-SMD 電機,SMDPhone-3-M 耳機座,三節R-0402-SMD 貼片電阻R-0805-SMD 貼片電阻RT9193-3.3S-KEY-SMD-324225 KEY,SMD,324225S8050-SMD SD-MICRO-TF SD,MICRO,TFU-AHT10 Sensor,溫濕度傳感器U-AP3216C Sensor.光照/距離U-AP6181 WIFI Module,SDIOU-ES8388 AUDIO,2-ch DAC,2-ch ADCU-ICM-20608 三軸陀螺儀/三軸加速度計,U-L9110S 電機驅動,800mAU-RT9013-3.3 LDO,500mAU-STM32F103C8T6 U-STM32L475VET6 MCU,LQFP100,512K FLASH,128K RAMU-W25Q128 SPI FLASH,16MY-12M-SMD 晶振 - 12M貼片Y-3215-32.768K XTAL,3215,32.768KY-3215-8M XTAL,3215,8MHz
標簽:
stm32l475
開發板
上傳時間:
2021-12-15
上傳用戶:
-
FPGA讀取OV5640攝像頭數據并通過VGA或LCD屏顯示輸出的Verilog邏輯源碼Quartus工程文件+文檔說明,FPGA型號Cyclone4E系列中的EP4CE6F17C8,Quartus版本17.1。module top( input clk, input rst_n, output cmos_scl, //cmos i2c clock inout cmos_sda, //cmos i2c data input cmos_vsync, //cmos vsync input cmos_href, //cmos hsync refrence,data valid input cmos_pclk, //cmos pxiel clock output cmos_xclk, //cmos externl clock input [7:0] cmos_db, //cmos data output cmos_rst_n, //cmos reset output cmos_pwdn, //cmos power down output vga_out_hs, //vga horizontal synchronization output vga_out_vs, //vga vertical synchronization output[4:0] vga_out_r, //vga red output[5:0] vga_out_g, //vga green output[4:0] vga_out_b, //vga blue output sdram_clk, //sdram clock output sdram_cke, //sdram clock enable output sdram_cs_n, //sdram chip select output sdram_we_n, //sdram write enable output sdram_cas_n, //sdram column address strobe output sdram_ras_n, //sdram row address strobe output[1:0] sdram_dqm, //sdram data enable output[1:0] sdram_ba, //sdram bank address output[12:0] sdram_addr, //sdram address inout[15:0] sdram_dq //sdram data);
標簽:
fpga
ov5640
攝像頭
上傳時間:
2021-12-18
上傳用戶: