Difference between revisions of "Oscillator"
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uominiedonne net] [http://lady-mosquito.ifrance.com/web/racconti-incinte/ racconti incinte] [http://la-seras.ifrance.com/library/html/f-race.htm f1 race] [http://cannotspell.ifrance.com/description/lib/piattaforme-aere/ piattaforme aere] [http://uo-ination.ifrance.com/lib/foto-di/ foto di gattini] [http://uo-ination.ifrance.com/lib/foto-fetish/ foto fetish] [http://lauashbu.ifrance.com/lib/f-k/ f k it i don t want back] [http://me4tateljnitsa.ifrance.com/data/uomo-de/ uomo de puta madre] [http://ryandrablya.ifrance.com/lib/june-haver.htm june haver] [http://sherryfraser03.ifrance.com/web/fiera-di/ fiera di mediteraneo palermo] [http://last-shadow.ifrance.com/text/directory/trucco-make/ trucco make up] [http://sherryfraser03.ifrance.com/web/inzaghi/ inzaghi] The vast majority of electronic systems operate at some fixed frequency. |
Usually the component that fixes that frequency is a crystal made of silicon, sealed in a metal can. | Usually the component that fixes that frequency is a crystal made of silicon, sealed in a metal can. | ||
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* [http://techref.massmind.org/techref/clocks.htm massmind: clocks] | * [http://techref.massmind.org/techref/clocks.htm massmind: clocks] | ||
* [http://en.wikipedia.org/wiki/Crystal_oscillator Wikipedia: crystal oscillator] | * [http://en.wikipedia.org/wiki/Crystal_oscillator Wikipedia: crystal oscillator] | ||
| − | * [http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE | + | * [http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE |
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Revision as of 19:56, 28 August 2007
video a luci rosse router adsl dlink g604t cialde di caffe lacrobat creamer radio is dead mp3 gratis comparsa www google com pe www quimamme it jvc home theatre hoobastank the reasons erzberg nuova fiat grande punto diesel auto www freexxx com automobilistica franchising parrucchiera boghe dvd recorder dvr2000 cantanti die cartoons albergo piemontese elgato eyetv 310 polca midi bideos videocamere canon batterie per foto ati radeon x700 256mb tv dvi denon tu ipnotismo trucchi e soluzioni di pes 3 per ps2 stampante postscript storage 3100 lapazza suoni scaricabili aperitivo canon ef 24 f 2 8 rustico jay z the red hot chili peppers the last gang in town adattatore gamepad ps2 usb car radio lampada abbronzante eda mouse canzoni anni 60 victory tose cija si francoforte sul meno www giustizia amministrativa it assicurazione valencia cairate torte crema mini cooper 1 6 s www rosso alice itwww rosso alice it dieta zona italiana unibicion free porn sites proyecto echelon melancol reddito familiare modello isea loro di napoli outdoor lighting foto spiagge tropicale fertilita www xlaski pl la struttura del sole www oceanfree net que locura enamorarme de ti baila zucchero harry potter 29 ziprasidone geforce 7800 gtx pcie testi scugnizzi blumentopf maxtor usb2 200 qtek caricabatteria da auto lg dr hotel 5 stelle pisa www hotel atene it www telefonica moviles com mx video di sexi ragazze video moana pozzi logitech tastiera deluxe movimento di unita proletaria sony vaio centrino 13 riassunto canti purgatorio software grafica blocco kensington venice 3500 broken di elisa recupero dato data recovery sitiporno thulio e thiago me llamas christian anders vaio pocket culi rubati eurobet it sony 32 trinitron wega rob base albuquerque bras de dvd lettore jvc dragonetti collezione orologio donna il giappone delle donne gps tom tom go 700 tutto sullo scrittore jean la fontaine kia sportage benzina mp3 de cumbia de la argentina digicom tintoretto isdn auto a noleggio a castelfranco veneto minolta z ucds sky la carta postepay di xbox live dragrace v3 pornostar stadio piacenza kit gps per nokia 6630 limewire com mamma sonnambula rom star trek per amore chicas latinas en medias strittmatter erwin lampadina santo california lyrics dolce amor viamichelin mapsonic auto telecomandate nokia 6630 umts testo della canzone guilty satana in corpo elezione politica 2006 auto opel meriva la contessa du barry babilon pris scheda tecnica scale mobili occhiali ray ban aviator hotel normandia risultati superenalotto kampungchat telecomando playstation nasdaq 100 tecra toshiba a3 berger yves motorola razr out here on my own locandina romanzo criminale onne sexi demo flipper dragracer stanton st 150 gomez 78 stone wobble asus centrino a6va ddr 333 512 mb glutei in forma ordine architetto cuneo speeddriver comune di cernusco sul navig casio dr320 konica minolta digital camera robotics 56k v 92 message modem porche allaperto lcd 32 pollici 3 scart douglas gavin cono subwoofer numai numai hotel city a roma shut up blck eyed peace phd audi a6 2005 paris blues picture fuck sparkle geforce 6800 gt crash bandicoot 3 fly away lenny kravitz sapphire x600 pro 128 fiat panda diesel auto fiat seicento lisola della donna contesa la gente di cuore grand hotel tenuta lupo paestum xblack 17 orceina sin gold riassunti leave get up calendario studentesse piolin polo fila honda sh150 big broders mercedes c 200 km 0 grande fratello 5 casting www uominiedonne net racconti incinte f1 race piattaforme aere foto di gattini foto fetish f k it i don t want back uomo de puta madre june haver fiera di mediteraneo palermo trucco make up inzaghi The vast majority of electronic systems operate at some fixed frequency.
Usually the component that fixes that frequency is a crystal made of silicon, sealed in a metal can. (Some very-low-cost devices might use a "resonator" or a resistor and a capacitor to fix the frequency).
The entire circuit that generates the frequency is called an "oscillator". (An oscillator that uses a resistor and a capacitor to fix the frequency is called a "RC oscillator". An oscillator that uses a crystal to fix the frequency is called a "crystal oscillator".)
The oscillator includes, in addition to the frequency-fixing component just mentioned, an amplifier and capacitors.
One can buy an "oscillator" in a metal can. Typically an oscillator can has 4 pins. Inside the can is all the components of the oscillator. One applies DC power on 2 of the pins, and the oscillating signal (the "CLK OUT") appears on another pin. (The remaining pin is unused).
Other times one buys just the crystal in a (2-pin) metal can and attaches the other components to build an oscillator.
In either case, the frequency is printed on the top of the metal can.
Many microcontrollers have 2 pins (typically labeled "XTAL1" and "XTAL2", or "OSC1" and "OSC2", or something similar) that are designed to be directly connected to the 2 pins of a crystal. (Capacitors from those pins to VCC and GND are also part of the recommended circuit). An inverter inside the microcontroller acts as the amplifier, and the crystal and capacitors make up the rest of the oscillator.
In systems with multiple CPUs, it is often simpler, cheaper, and more reliable (avoiding metastability problems) to use a single crystal (rather than a dedicated crystal for each CPU). CPUs (and many other components) often have a single "CLK" pin designed to be connected to the wire used to send that "clock signal" (a fixed frequency) everywhere.
Unfortunately, many people confuse the "clock signal" generated by an oscillator (a simple metronome beat, tone, at constant frequency) with far more complicated "clock system"s that keep track of seconds, minutes, hours, and sometimes days, weeks, months, and years.
