DS200ADPBG1A

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描述

很多現(xiàn)代音頻放大器的設(shè)計沒有考慮高頻RF問題,而這些放大器卻越來越多地暴露在強RF干擾環(huán)境中。對于沒有解決RF干擾的音頻放大器設(shè)計,會將RF載波信息解調(diào)到音頻頻帶。
? ? 一個非常突出的例子是GSM(全球移動通信系統(tǒng))蜂窩電話系統(tǒng)。GSM標準采用時分多址(TDMA)方式實現(xiàn)多部手機與一個基站的同時通信。GSM手機以217Hz突發(fā)頻率發(fā)送數(shù)據(jù),從而產(chǎn)生一個受217Hz頻率調(diào)制的強電場,恰好處于音頻頻帶。雖然GSM手機工作在800MHz至1900MHz頻率范圍,但217Hz的包絡(luò)是固定的。
? ? GSM手機內(nèi)的放大器必須能夠抑制RF載波的217Hz包絡(luò)頻率,或完全屏蔽其電場。放大器與音頻信號源之間的引線相當于天線。對于1/4波長與引線長度匹配的頻率,天線效應最明顯。對于900MHz信號,1/4波長為7.5cm;對于1900MHz信號,1/4波長為3.5cm。因此,長度接近于上述兩種規(guī)格的引線對附近功率放大器的干擾信號最敏感,會接收到較強的
? 隨著移動電話音頻放大器數(shù)量的不斷增加,上述問題越來越明顯。立體聲耳機放大器給外部耳機提供聲音和音樂信號;立體揚聲器放大器則提供擴音和重放功能,需注意保證每個音頻放大器都不受移動電話發(fā)射RF能量的影響。雖然揚聲器和耳機放大器都能接收RF信號,但耳機放大器的信號幅度較低,問題更復雜。值得慶幸的是,可以通過多種途徑降低RF噪音對放大器的影響。

?雖然采用集成技術(shù)可降低系統(tǒng)的RF敏感度,但基帶處理器通常采用的是低成本耳機放大器,會在一定程度上降低音質(zhì)。此外,這些放大器采用單電源供電,其輸出信號的偏壓在VDD/2左右。在將這些信號接至耳機揚聲器時需要隔直電容,而隔直電容會占據(jù)很大的PCB面積,降低系統(tǒng)的低頻響應,同時還會導致音頻信號的失真。
? ? 由于集成方案中的耳機放大器靠近基帶處理器,使敏感的模擬電路靠近嘈雜的數(shù)字電路,又會增加放大器的噪音輸出。最終,集成方案也增大了耳機放大器地線布局的難度,從而降低系統(tǒng)音質(zhì)。

Cognex 4300 Vision board – for GSI M310 laser system

Cognex In-Sight 5000 IS5000-00 800-5840-4 Vision Sensor

COGNEX VPM8100VS-000-P Rev.A OPT:A PCI Card

COGNEX LED RING LIGHT CLM 4236

Cognex In-Sight 5100 Series IS5100-10C

New Cognex Machine Vision Camera In-Sight 5400

Cognex Insight 5100 Vision System

COGNEX VM16A 203-0075-RE ISA BUS VISION BOARD

COGNEX VISION SYSTEM 4400,VBM-4438-1?33

Cognex In-Sight Set of 2

COGNEX VISION CONTROL BOARD VPM-8100LX-000 REV:A OPT:A

Cognex in sight 1000 vision camera

NEW Cognex 300-0341-15 Cable NSFP 300034115

COGNEX 4300,VPM-4334-0?0 VISION SERIES BOARD

COGNEX 300-0274-7 VISION PROCESSOR TERMINAL CABLE

COGNEX MVS 8100 Frame Grabber Whit SONY XC-75 Camera

Cognex In-Sight 5100 Series IS5110-00C

Cognex In-Sight 1701

1 NIB COGNEX CLM-LDLTP51X51-?00 CLMLDLTP51X5100 MODULE

NEW COGNEX CABLE 185-0264R CCB-84901-0901-?02

Cognex CLM 4260 Light Ring, NEW in Box, 4″ LED

COGNEX IN-SIGHT 5400 VISION CAMERA ISS-5400-0000

Cognex Machine Vision System Checkpoint 400

Cognex In-Sight IS5100-00, In-Sight Vision Camera

USED Cognex Camera System LOT CKR-232-002 CKR-200-IOBOX

Cognex In-Sight I/O Expansion Module, Break Out Box

COGNEX CHECKER 101 807-0007-2 REV C VISION CAMERA

COGNEX IN-SIGHT VISION SYSTEM 800-5809-1 807-9003-1R ++

Cognex In-Sight 1000, In-Sight Vision Camera, 800-5740

Cognex Checker 101 Vision Sensor 807-0007-2 REV B

COGNEX CHECKER 101 807-0007-2 REV A VISION CAMERA

CCS PD-3012 LED Vision Light Power Supply, Cognex, Dual

COGNEX VME 4400 SERIES VPM-4418-002 MACHINE VISION

Cognex 300-0232-015R Rev.A , 4 CH. Camera Cable

Cognex Vision Lighting Cable, CLA-CB5-00, NEW

COGNEX IN-SIGHT 1000 VISION SENSOR 2 COMPLETE SETS NEW

Cognex Checker 101 807-0004-5 Rev. F 8O7-OOO4-5 150 MA

CCS PB-2430 LED Vision Light Power Supply, Cognex, Dual

Cognex In-Sight 5100 Series I/O Expan. Module CIO-1460

Cognex Checker DIN Rail Mount Interface 800-5888-2 B

COGNEX VISION SYTEM IN-SIGHT-3400 CAMERA MODULE

COGNEX LED BackLight Red IARB-040424 24vdc Adv Illu 162

COGNEX 800-5712-2 A Vision Processor I/O Module *NIB*

cognex checker 101 vision sensor

COGNEX IN-SIGHT 1701 WAFER READER

Cognex MVS 8100 Frame Grabber VPM-8100S-000 Rev A Opt A

Cognex 1500 VB1 ASP-1502-220 4-channel Vision System

Cognex In-Sight 5100 Series cable 185-0265 rev A

Cognex In-Sight 1000 Break Out Box, Excellent Condition

Cognex In-sight 2000 Insight Machine Vision Controller

Cognex In-Sight 4100 PN: 800-5763-1 Rev E

Cognex Vision Applied Kinetics model SAZ V6.1 & Camera

Cognex In-Sight 4100 800-5763-1 Rev 2

COGNEX IN-SIGHT 2000 800-5714-1 REV G VISION SYSTEM

COGNEX VISION LASER CAMERA VPM-8100LVQ-000?-P NEW (NIB)

CAMERA Cable for COGNEX 300-0135 REV.B ACT 814

Cognex In-Sight model 1010 Vision Sensor 800-5749-1

COGNEX DVT LEGEND 630-C3E40 SMART IMAGE SENSOR CAMERA

Cable for COGNEX CAMERA 300-0135 REV.B AI

COGNEX 300-0135 Rev B AI/FOCS Camera cable

Cognex 014204-020 Machine Vision Overlay Card Imagraph

Cognex In-Sight 1000 Break Out Box vison

Cognex LED Light CLM-DFLDR70A-00 119-0099 new

Used Cognex Vision Process Module Card VPM-8120X-5061-?P

Cognex In-Sight 4100 800-5763-1 Rev B

Cognex DM100-IOBOX-000 Expansion Module – NEW

Cognex 300-0232-015R Rev.B1 , 4 CH. Camera Cable

Cognex In-Sight 5100 Series cable 185-0253 rev A

Cognex Dataman DM 7550 LR USB Cordless DPM 2D Reader

Cognex 300-0132 Rev B RIBBON CABLE 40 PIN CONNECTOR

COGNEX 800-5741-1 MODEL IN-SIGHT 1000 SENSOR ***XLNT***

IFP 08 P-24-56A-1 for COGNEX 2004 PCB

Cognex VISION SYSTEM INSIGHT 4000 W/CABLE and IO Module

CDN366-2 & 300-0277-08 COGNEX DEVICENET CONVERTOR&CABLE

Cognex 800-5740-1 Rev. K In-Sight 1000 Processor Camera

Cognex 300-0107 Rev B Serial Port

Cognex In-Sight 1000, 800-5740-1,came?ra w/35mm lens

Cognex In-Sight 4000 Cognex 800-5762-1 Vision Camera

Cognex I/O Expansion Module 800-5758-1 Revision J

COGNEX 4100 VISION SERIES BOARD

Cognex 82403/pci 400MH/64MB Vision Processor Module

DVT Cognex smart light array IDIA LED module

COGNEX 8110-CVM6-32 VISION PROCESSOR CARD FRAME GRABBER

Broken Cognex Dataman DM 7500 USB DPM 2D ID Reader

RVSI COGNEX VISION INTERFACE BOARD

Cognex In-Sight model 1000 Vision Sensor 800-5749-1

Cognex 300-0277-08 Rev A In-Sight Serial Adapter

Cognex Checker Rail Mount Interface 800-5888-2B

Used Cognex Vision Process Module Card VPM-8120X-5061-?P

ALPHASEM COGNEX FRAME GRABBER 8120 CVM9

Cognex P/N 800-5637-1

Cognex Vision Processor 800-5712-2 B 200-0142-1 D

COGNEX DMR-100Q

COGNEX 300-0341-15 NEW 300034115

Cognex Monitor Display Screen CTM-ENET-104

New COGNEX Expansion Module CIO-1400 800-9012-2R

Cognex Camera Insite 4000

DVT/Cognex Color Inspection Camera 542C

Cognex In-Sight 5100 Series cable 185-0248 rev A

Cognex Cable 300-0099-15 New

Cognex KV-7100N-PKG-E 7000-0015-01

Cognex Cable 300-0099-15 Used

COGNEX VISION CONTROL 4400 FRAME GRABBER 44124-003 MODU

Cognex 4000-9901 Camera Control Panel Box Enclosure

COGNEX ISS-5400-0000 USPP ISS54000000

Cognex VPM-59416-00S Vision System

FUJI 4800 VME:48316-32F VISION CONTROL BOARD BY COGNEX

Cognex In-sight 1010 800-5749-1 Breakout Module Q new

Cognex CCs PD2-3024-00 New IN Box

COGNEX 4400 FRAME GRABBER 44124-003 MODULE

COGNEX MACHINE VISION VME-4418-1MX PROCESSOR MODULE

Cognex ADC-1460 P/N 185-0221

FUJI VME 4800 VISION CONTROL BOARD FRAME GRABBER COGNEX

Used Cognex Vision Process Module Card VPM-8120X-5091-?P

PVC-3 0401 20001361 A (Cognex?)

COGNEX 4400 VISION CONTROL BOARD FRAME GRABBER 4438-002

CKR-202-002 Cognex Checker 202 with IO Box cable

Cognex 800-0037-2 Rev B

Cognex VPM-59432-20GS Vision Module

1 NIB COGNEX 800-5758-1 80057581 I/O EXPANSION MODULE

Cognex DVT Legend 542C Color SmartImage Sensor 542 C

COGNEX CLM-2420-00 NSFP CLM242000

Cognex CLM 2420 Spot Light

COGNEX Cable – 300-0340-15R Breakout, Power, 5M Insight

Cognex 800-5714-1 REV B Controller

COGNEX VPM-8100Q-001-P NSFP VPM8100Q001P

Used 3 Cognex Camera Cables 300-0215

Cognex NAV C Mount 16 mm Lens LNC-16FNO

COGNEX 801-8120-01 NSFP 801812001

DVT COGNEX DVT-SL

CKR-200-IOBOX Cognex Checker 200 IO Box

COGNEX In sight 2000 Machine Vision Camera Control Box

COGNEX VM16A-203-0075-?RB USPP VM16A2030075RB

COGNEX DVT Light Kit 500R-LGTKIT

CKR-201-002 Cognex Checker 201 with IO Box cable

Cognex Cable 300-0367 CDC50/100/200 cams to 8100D – 30′

1 NEW COGNEX 800-5758-1 80057581 I/O EXPANSION MODULE

Cognex VM18B PC Board

Cognex Dataman 7550 USB Cordless Handheld DPM ID Reader

COGNEX VPM-8110Q-5011-?P NSPP VPM8110Q5011P

COGNEX LFC-35F1 NSFP LFC35F1

DVT COGNEX CON-EBC ETHERNET I/O BUS COUPLER

Cognex In-Sight 3000 Camera Controller, 800-5745-1

COGNEX LFC-16F1 NSFP LFC16F1

COGNEX 807-0004-4 NSPP 80700044

TAMRON (COGNEX) LTC-05Z

COGNEX CCB-84901-1002-?02 NSFP CCB84901100202

COGNEX DVT SMARTIMAGE MULTIPLEXER WITH DVT SERIES 800

COGNEX 801-0001-01 NSPP 801000101

COGNEX 200-0091-2 USPP 20000912

COGNEX 200-0053 USPP 2000053

COGNEX 300-0316-100 NSPP 3000316100

COGNEX CLA-FCB5-00 NSPP CLAFCB500

COGNEX 300-0135-018 NSFP 3000135018

COGNEX CKR-IOBOX-101 NSFP CKRIOBOX101

COGNEX 300-0133 USPP 3000133

COGNEX 300-0277-08 NSFP 300027708

COGNEX CLA-FCB5-00 NSFP CLAFCB500

COGNEX DM100-PWR-000 USPP DM100PWR000

COGNEX CLM-4260-00 NSFP CLM426000

Cognex In-Sight ISS-5110 W/Cables,softwa?re, 1450 Module

CKR-LENSKIT-101 cognex checker 100 Lens Kit

COGNEX DM100-PWR-000 NSFP DM100PWR000

COGNEX CKR-LENSKIT-101?-00 NSPP CKRLENSKIT10100

Cognex In-Sight Model 1350 Breakout Module

COGNEX CKR-LENSKIT-101?-00 NSFP CKRLENSKIT10100

COGNEX DMR-100S-00 NSFP DMR100S00

CKR-IOBOX-101 Cognex Checker 100 IO Box

COGNEX CKR-101-00 USPP CKR10100

FUJI VME 4400 VISION CONTROL BOARD FRAME GRABBER COGNEX

COGNEX CKR-BKTADJE-101?-00 NSFP CKRBKTADJE10100

COGNEX 300-0274-7 NSFP 30002747

Cognex DVT Ethernet To Serial Converter CON-ETS 161

COGNEX CVC-1000 USPP CVC1000

Cognex In-Sight I/O Expansion Module, 800-5758-1

COGNEX 300-0318-30 NSPP 300031830

COGNEX 805-0010-1 NSFP 80500101

COGNEX 300-0132 NSPP 3000132

COGNEX LFC-25F1 NSFP LFC25F1

COGNEX CCB-84909-0207-?50 NSPP CCB84909020750

COGNEX 800-5712-2A NSPP 80057122A

Cognex InSight Micro Ethernet I/O Module CIOWENET00 161

COGNEX 300-0278-15 USPP 300027815

COGNEX 119-0081 USPP 1190081

COGNEX 300-0142 USPP 3000142

COGNEX 206-6364-270 NSFP 2066364270

COGNEX INRK-1503 NSFP INRK1503

COGNEX LTC08F NSFP LTC08F

COGNEX 805-0053-3-H NSFP 80500533H

COGNEX IDIA NSFP IDIA

IDWA COGNEX SMART LIGHT WHITE *NIB*

COGNEX IDIA USPP IDIA

COGNEX EXT40MM NSPP EXT40MM

COGNEX LDS1 NSFP LDS1

COGNEX 119-0082 USPP 1190082

COGNEX 800-5888-2 B NSFP 80058882B

COGNEX QRL-090050-66 NSFP QRL09005066

COGNEX CCB-84909-0209-?15 NSPP CCB84909020915

COGNEX 800-5712-2 VISION PROCESSOR

COGNEX CIO-1450 USPP CIO1450

COGNEX 300-0341-15 NSFP 300034115

COGNEX 800-5743-1 USPP 80057431

Used Lot of 6 Cognex Camera Breakout Box P/N 800-5637-1

COGNEX 800-5712-2A USPP 80057122A

COGNEX 300-0341-15 NSPP 300034115

COGNEX TURBO I/O LED BOARD REV1.0 USPP TURBOIOLEDBOARD?R

IDRA COGNEX Smart Light Red

LNC-XKIT Cognex DVT

COGNEX DVT-554C NSFP DVT554C

COGNEX CLA-FCBW-00 NSFP CLAFCBW00

COGNEX 800-0037-9 NSPP 80000379

COGNEX 800-5714-1 USPP 80057141

DVT smart light Leds IDRA No cognex

COGNEX 800-5740-1 USPP 80057401

COGNEX 800-5743-1 NSFP 80057431

COGNEX 800-5637-1 USPP 80056371

COGNEX 800-5743 USPP 8005743

COGNEX 800-5746-1 USPP 80057461

COGNEX 800-5740-1 NSFP 80057401

COGNEX 800-5760-1 NSFP 80057601

COGNEX 800-0035-1 NSFP 80000351

COGNEX IC065562 FNFP IC065562

COGNEX IC057022 FNFP IC057022

Xycom inspection camera video Checkpoint Cognex Towanda

COGNEX 800-5815-1 USPP 80058151

COGNEX 800-5762-1 NSPP 80057621

Cognex /DVT IS Legend Intelligent Scanner Camera

COGNEX 800-5745-1 USPP 80057451

Cognex /DVT LS Legend Line Scan Camera

CON-IBOB Cognex DVT ISOLATION BREAK-OUT BOARD

Cognex In-Sight 5400 Smart Cameras With Cable

Used Lot of 5 Cognex Camera Breakout Box P/N 800-5637-1

COGNEX In-Sight 3400 IS3400 VISIOM SYSTEM

Cognex MVS 8100 Frame Grabber VPM-8100S-000 Rev A Opt A

Cognex VM18A 203-0045-R4 vision processor board

COGNEX 8110-CVM6-32 VM22A 203-0079-RA FRAME GRABBER

COGNEX 4400 VM13B REV T VISION PROCESSOR MODULE

Cognex Industrial Flat Panel LCD Monitor CIM-LCD-104

Hirose 12 Pin Cam Cable 4.50m., for cognex to sony cam.

COGNEX IN-SIGHT 1010 INSPECTION CAMERA SENSOR INSIGHT

COGNEX IN-SIGHT 1000 BREAK OUT BOX INSIGHT BREAKOUT

Cognex NotchMax IS5100 IS5100-NMAX-KT0?0

Cognex 200-0024 4400 Video Frame Grabber (VDE BUS Boar

DVT / COGNEX LEGEND 510MR + TAMRON 25mm LENS + ILLUMNTR

Cognex 4400/VME

Cognex 800-5885-1 I/O Connection Module


選擇深圳長欣,選擇放心,售后無憂大量現(xiàn)貨,當天順豐發(fā)貨!
主營:本特利,英維思,伍德沃德,福克斯波羅、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

先介紹幾點經(jīng)驗。
1、先通讀一遍“系統(tǒng)手冊”(不管能不能看懂,先了解個大概,以便學習編程時查找);
2、由位控邏輯入手,逐漸增加定時、計數(shù)等條件,把或、與、非關(guān)系理順;
3、進而練習整數(shù)運算、實數(shù)運算、類型轉(zhuǎn)換;
4、量程轉(zhuǎn)換、PID調(diào)節(jié)回路的建立及P、I、D參數(shù)的理解(最好是有個物理回路驗證,比如變頻器+電機+測速傳感器);
5、循環(huán)、順序、跳轉(zhuǎn)等程序控制(盡量避免跳轉(zhuǎn),非跳不可時也是跳的越近越好);
6、中斷、通訊、位置控制....

本人以ABB工業(yè)機器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅(qū)動器系列為主攻。各位電工朋友可根據(jù)自己的條件選擇適合自己的PLC品牌,由于PLC的基本框架大同小異,學會一種至于其它的學習起來也就簡單了。