Op amp

From OpenCircuits
Revision as of 11:06, 6 November 2007 by 158.232.241.4 (Talk)

Jump to: navigation, search

diaper for adult local swingers 14 year old having sex biaxin you make a woman orgasm norton utility for dos impotent labor law pa poster index pierre cardin political climate of 1920s medical assistant jobs in new york wholesale bargains page sex cartoon port arthur new bozine.info gardening shadow masks atreyu bleeding mascara lycopene supplement rhode island jenna jamison umax scanners professional adviser awards 2005 stl file greenday zodiac signs nagra2 poclain hydraulics t mobile razor cell phone a virtuous life ohio valley conference tournament logitech web cam for mac calories in cube steak bare naked ladys address plaque packard bell notebook review to i can get my satisfaction continental airline tickets urdu font for windows washington park portland map las vegas entertainment october office depot coupons ana kurnikova sexy chats motorola v60 spiderman power in japan sailor moon outfits online tramadol empower airline mattress rating runescape autoers thomas cook uk holidays 5 blue day in may rodeo alltell free ringtones epson replacement ink cartridge toddler bed animal ray x webmail window media center 2005 serial army chapter 5 nissan part publicservice commission cheap vardenafil wooden handles for fan bang brothers microsoft photoshop blackplanet backgrounds z600 games download java number prime program dealerships site generic drug run while you can lyrics puerto rican last name hjc helmet golf swing new york pizza exchange atlanta ga orlando international airport vacuum physics about winston churchill embarrassing naked pic 222 car central approximation algorithms passport to get into mexico home citalopram hydrobromide hardcore fucking private sector development strategy may no longer be usable incloude.info rose hill estate stevemadden shoes tv video output tail windows download cameltoe-forum pen pals international email free new adidas soccer ball adam baker charlie discount zocor mangrove mountain peace on earth cartoon non hazardous waste uk phentermine online sky plus hard drive upgrade tracker cars long beach organics 16 year old german models pet care pet pregnancy gender charts wholesale frame service american murder rate order norco afghan crochet pattern kid teen what guys look for in girl quilting square pattern mysteriously order cyclobenzaprine residents fellows applied control equipment what about us mach one inc i wanna be your lover song man who are controlling verizon ringtones sk8 shops abrasion micro lucas sanchez precision flight controls inc buy zocor oxygen molecule structure woman pant set anime love story picture of semana santa oracle unlock enter matrix cheats pc american society of certified public accountants meet joe black theme legal music downloads in canada mls canada listings download audiovox ringtones antonio patent san search occupational health service art clip wings 150 in ohio park under water profession engineer exam niagara falls hotel casino six flag promotion 19th and 20th centuries atlantic electric and gas website scar gel order codeine wholesale sign manufacturer karla baker glucophage cricket ringtone pci express video cards nvidia sandra bullock films the big love movie top 100 hard rock bands buy buspar away message quotes flexeril springfield delaware county school closing number safe alarm monitoring phila museum of art pierce county election result el estado moderno advertising television and radio production add battery notebook site lab medical national professional week wwe ringtones translate french phrases into english rocket launch video sea boss reviews zanaflex online statewide criminal record check download mono ringtones st anthony shrine boston make peanut butter at home mozilla firefox mac os x download new best seller metformin ass fucking nice round patriots helmets order ionamin advantage comparison difference height east orange police dept order ephedra welcome to peoples first picture of anchor massive booty download polyphonic ringtones recent sales massachusetts cheap clomid 21st century community learning center 4th of july girls An op amp ("operational amplifier") is ...

Great for amplifying weak signals from sensors to a more useful level. Also used in filters, integrators, etc.

Contents

quick summary

  • Many sensors need an amplifier to "buffer" their output signal. Often a single op amp is adequate. For very weak signals, you may want a "difference amplifier" or "instrumentation amplifier".
  • All ADCs need an anti-aliasing filter on their input. Often a single op amp, 2 caps and 4 resistors is adequate.
  • If you want to hear a signal, use a LM386N-3 (under $1) to amplify it enough to drive a small speaker.
  • If you want to drive heavy loads (big speakers, big antennas, electric motors, etc.), too heavy for typical op amps to drive, use op amps to amplify the signal to the desired voltage, followed by power transistors to drive the load [Veselinovic].

details

Suppliers such as Jameco, Digikey, and Newark each have pages and pages of fine print listing hundreds of op-amps, from "low-cost" quad op amps for under $0.40 each to "hi speed precision" op amps for well over $10 each. That doesn't include more complex devices (such as voltage regulators and RS-485 transcievers ) that combine op amps and other components on a single IC. Each one of those op amps has a data sheet several pages long packed with lots of details, which you can freely download from the manufacturer's web site.

"But in reality, there are only two important specifications that you should initially consider when selecting an op amp for your active, low-pass filter. ... Gain Bandwidth Product and Slew Rate." [Baker 2003]

designing the circuit around the op amp

selecting the appropriate op amp out of the hundreds (thousands?) available


Personal tools
Namespaces

Variants
Actions
Navigation
Toolbox