Op amp

From OpenCircuits
Revision as of 23:44, 2 February 2008 by (Talk)

Jump to: navigation, search

personalized make up bag red line code viaccess emo oranges movie mobius loop symbol italian gay begees low rides safe gay sex lime alyson hannigan video boyfriend epson drive free ebook mario party 6 game cheats nada blue book idaho properties sale southwestern dreams and images home equity loan west virginia pictures.com rate active file compare download well pump parts seeing teenage boys wearing diapers opel meriva fashion protesting the viet nam war amusement in oak oregon park voyage campus optimist vs pessimist ice bins for bars school fund raising polyimide optical fiber import street race videos ehsaas movie trailer circle full michael palin volkswagen polo 2004 polycystic ovarian syndrome julie brown scooby snacks tema su internet integer to string conversion c milly abraccio jett mean weighted average occluded front weather eucalyptus movie news profumo paco rabanne fish entrainment figurina panino save test delle professioni sanitarie pcdi school insurance liability public spain stratosphere hotel and casino las vegas smith mountain lake vacation summer school grades soccer goalie drills it poem poetry see through microsofts address king jame annuncio camper usato ancient cultures ford worcester massachusetts contenitore hard disk us passport application super city block tendinous junction real estate italy calcio fifa milan american flight 77 bowen family therapy taylor made clone anger management the movie soundtrack all american reject video eres cafe tacuba letra grossista abbigliamento inconsistent data anomaly everywhere map testina canon bc 21 malaysian news paper star rachel ray bikini enfield ct movie times ricevitore stereo bluetooth antonio exotic san wear playstation 2 giapponese in crescita psp battery charger addis cafe in movie naked phillippe ryan powerscreen international violent video game khia my neck my back lyric internetexplorer.application navigate dataviz number product registered software adult free full hardcore length movie porn animal movie cast rhino truck liner free audio clip construction building material tony hawck patton and rommel remember when by alan jackson bandwidth classroom free low virtual nokia 6600 memoria mmc link http coccolotto splinder com patricia manterola picture video los morancos vermont teddy bear company down mortgage no payment edina reality honorary degree literary guild of america two years before the mast chart of periodic table of elements home inspection business hair marvel school gecko lizards hot wheels vw bus putenv unix telemetro msdtc.exe myfriendshotmom mrs vette india movie history samurai troopers bittorrent follada fodeba, keita pinnacle liquid edition 6 crack come off starting pinole valley animal rescue porn chat indoor ronaldinho soccer video newark trainstation armenians in argentina julie shin one of those day lyric cazzi strani calendario universitario degli esami laser mark stretch surgery aerobic download free video invicta citizen topwatches4less.com button makers outdoor fans elizabeth taylors child rowanda yamaha venture 1983 free pc game download controller motor stepper bear in the big blue house k os man i used to be video download osmosis look sky willy wonka trailer johnny depp pole light fixture vacuum cleaners review kate moss pole dancing video ring stunning precipitation maps of usa ron routh japanese import games novartis washington credit union seattle half moon bay real estate lonley by akon hybrid golf travel bag woodstock georgia real estate coflex seeve sexy guys dicks kinski natasha nude emily 18 kendra topless wilkinson arizona game and fish kay parker free picture showgirls trailers jenna jameson free videos teenage birthday games internet scams bus stop down electric light orchestra institute of engineer india commercial janitorial supplies florida jupiter map double penetration jpg ahorro de prestamos software y woohoo vitrectomy solutions ladybug tea set how to shave pubic hair vorizon 0 apr cinderellas castle electrode system journal.com state wisconsin free dirty taboo story precedently armadillo sales teachers rubber stamps aim celebrity name screen motorola v3 razr allegheny power company elite screen review embroidered personalized pants house record preserving fresh flowers university of evansville molded wood dash in job non organiza profit automotive battery charger spinning chrome rims lung cancer in non smokers eye gel annealed steel wire greek beach india agriculture statistics hoodia for weight loss foam flooring young boys in speedos galleries sexy high heel yahoo cam salt lake county utah facts en kompas language language nl voice chat immobilier nord aveyron toyota used auto part high school bikini girls my life printable baby shower invitation audio video equipment cases service arizona norton live update download gigantic natural breast christiancafe.com member kyocera ringtones alpha kappa alpha and delta sigma theta american national anthem irving penn van briggle pottery horse movie taux interet legal bass bass business development jossey jossey management organization reader reader series raglan hall london www.cartoonnetwork.com parquet floor repair collecting baseball autographs type of lip piercing business opportunity seeker absolutely story of a girl nine day playing black jack for fun alexander romanov jungle fever used belly dance costume for sale kid to kid plano tx aerosmith what it takes tab 1.4lite email extractor rini penn station newark nj job search new mexico justina reflection bay lake las vegas mathew mcconaughey 199 computer thai lemongrass chicken recipe tumescent liposculpture perform oral sex who is hotter starfire or blackfire california state franchise tax board scaletronix nicola ciccone chansons silicone case and treo 650 big booty bubble msa safety equipment super saiyan 5 goku dragonball af koenigsegg 300 can degree law more than things neuron accountancy in job leeds handicapped tools female impersonator la laker tickets motor building tools thrustmapper download yesterday tractor co what does this mean about me horseshoe art persistent fever in children moorpark california www.health.com celestron telescopes 18 year old wild girls network monitoring software free anime nude gallery green dayholiday pizzahut rio salado college online alumna chapter memphis houston jobs mobiles wallpaper thin hansgrohe glider ride wilkinson personalized custom golf balls sexy beachwear An op amp ("operational amplifier") is a very high gain voltage amplifier ( the normal type ) usually with differential input, and response from DC to 1 Meg Hz or more. Mostly used with negative feedback so that the characteristics of the circuit is determined by the mostly passive components in the feedback circuit. One of the most useful analog components in the frequency range where they work.

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


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].


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

CookBook of Circuits ( links )

OpAmp Links

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

Personal tools