Pali magawo ambiri a resistor, nthawi zambiri timakhudzidwa ndi mtengo, kulondola, kuchuluka kwa mphamvu, zizindikiro zitatuzi ndizoyenera.Ndizowona kuti m'mabwalo a digito, sitiyenera kulabadira zambiri, pambuyo pake, pali 1 ndi 0 yokha mkati mwa digito, osawerengera kuchuluka kwapang'onopang'ono.Koma m'mabwalo a analogi, tikamagwiritsa ntchito gwero lolondola lamagetsi, kapena kutembenuka kwa analogi-to-digital, kapena kukulitsa chizindikiro chofooka, kusintha kwakung'ono pamtengo wotsutsa kudzakhala ndi chikoka chachikulu.Mu nthawi ya kugunda ndi resistor, ndithudi, ndi mu nthawi kukonza ma siginecha analogi, ndipo kenako, malinga ndi analogi dera ntchito kusanthula zotsatira za aliyense chizindikiro cha resistor.
Kuchuluka kwa mtengo wotsutsa wotsutsa - kuchuluka kwa mtengo wotsutsa wa kusankha kotsutsa nthawi zambiri kumakhazikitsidwa ndi ntchito, monga malire a nyali ya LED, kapena chitsanzo chamakono chamakono, mtengo wotsutsa wotsutsa kwenikweni palibe njira zina.Koma nthawi zina, pali zisankho zosiyanasiyana zotsutsa, monga kukulitsa kwa siginecha yamagetsi, monga momwe tawonetsera pachithunzichi, kukulitsa kumagwirizana ndi chiŵerengero cha R2 mpaka R3, ndipo sichikugwirizana ndi mtengo wa r2 ndi r3.Panthawiyi, kusankha kutsutsa kotsutsa kumakhazikitsidwabe: kukana kwakukulu kwa resistor, phokoso lalikulu la kutentha, kuwonjezereka kwa amplifier;zing'onozing'ono zotsutsana ndi zotsutsa, ntchito yaikulu ndi yamakono, phokoso lalikulu lamakono, ntchito yowonjezereka ya amplifier;Ichi ndichifukwa chake mabwalo ambiri okulitsa amakhala makumi a K kukana, pakufunika kugwiritsa ntchito mtengo wokana kwambiri, kapena kugwiritsa ntchito otsatira ma voltage, kapena kugwiritsa ntchito ma T-network kuti mupewe.
Non-Inverting Amp
Kulondola kwa resistor - kulondola kwa resistor kumamveka bwino, apa musatchule mawu.Zotsutsa zolondola nthawi zambiri zimakhala 1% ndi 5%, zolondola mpaka 0.1%, etc. Mtengo wa 0.1% uli pafupi nthawi khumi kuposa 1%, ndipo 1% ndi pafupifupi 1.3 nthawi zoposa 5%.Nthawi zambiri, nambala yolondola A=0.05%, B=0.1%, C=0.25%, D=0.5%, F=1%, G=2%, J=5%, K=10%, M=20%.
Mphamvu yakutsogolo ya resistor - mphamvu ya chotsutsa ikanakhala yosavuta, koma nthawi zambiri yosavuta kugwiritsa ntchito molakwika.Mwachitsanzo, 2512 chip resistor, mphamvu ya quota ndi 1W, malinga ndi zomwe zimatsutsana, kutentha kumapitirira madigiri 70 Celsius, chotsutsa chiyenera kuchepetsedwa kuti chigwiritsidwe ntchito.2512 Chip resistor pamapeto angati mphamvu angagwiritsidwe ntchito, firiji, ngati ziyangoyango PCB popanda wapadera kutentha dissipation mankhwala, 2512 Chip resistor mphamvu 0,3W, kutentha kungakhale kuposa 100 kapena madigiri 120 Celsius..Mu kutentha kwa madigiri 125 Celsius, malinga ndi kutentha komwe kumapindika, mphamvu ya 2512 iyenera kuchepetsedwa mpaka 30%.Izi mu phukusi resistors aliyense ayenera kulabadira, musakhulupirire mwadzina mphamvu, malo kiyi ndi bwino kuwirikiza cheke kupewa kusiya mavuto zobisika.
Resistor kupirira mtengo wamagetsi - mtengo wamagetsi wotsutsa nthawi zambiri sutchulidwa, makamaka kwa obwera kumene, nthawi zambiri amakhala ndi lingaliro lochepa, poganiza kuti ma capacitor amangopirira mtengo wamagetsi.Mpweya womwe ungagwiritsidwe ntchito pamapeto onse a resistor, imodzi imatsimikiziridwa ndi kuchuluka kwa mphamvu, kuonetsetsa kuti mphamvuyo siidutsa mphamvu ya mphamvu, ina ndiyo kukana kwa mtengo wamagetsi.Ngakhale mphamvu ya resistor thupi si upambana mphamvu oveteredwa, voteji kwambiri kungachititse kusakhazikika resistor, creepage pakati pa zikhomo resistor, ndi zolephera zina, choncho m'pofunika kusankha resistor wololera malinga ndi voteji ntchito.Ena mwa phukusi kupirira voteji makhalidwe monga: 0603 = 50V, 0805 = 100V, 1206 kuti 2512 = 200V, 1/4W pulagi-mu = 250V.Ndipo, kugwiritsa ntchito nthawi, voteji pa resistor iyenera kukhala yaying'ono kuposa kuchuluka kwa voteji yopitilira 20%, apo ayi ndikosavuta kukhala ndi zovuta pakapita nthawi yayitali.
Kutentha kokwanira kwa kukana - Kutentha kwa kutentha kwa kukana ndi chizindikiro chomwe chimafotokoza kusintha kwa kukana ndi kutentha.Izi makamaka anatsimikiza ndi zinthu za resistor, zambiri wandiweyani filimu Chip resistor 0603 phukusi pamwamba akhoza kuchita 100ppm / ℃, kutanthauza kuti resistor yozungulira kutentha kusintha 25 digiri Celsius, kukana mtengo zingasinthe ndi 0,25%.Ngati ndi 12bit ADC, kusintha kwa 0.25% ndi 10 LSB.Chifukwa chake, kwa op-amp ngati AD620, yomwe imadalira chotsutsa chimodzi chokha kuti chiwongolere kukulitsa, mainjiniya ambiri akale sangagwiritse ntchito kuti zitheke, adzagwiritsa ntchito dera wamba kuti asinthe makulitsidwe ndi chiŵerengero cha otsutsa awiri.Pamene zotsutsa ndizofanana ndi zotsutsana, kusintha kwa mtengo wotsutsa chifukwa cha kutentha sikudzabweretsa kusintha kwa chiŵerengero, ndipo dera lidzakhala lokhazikika.Pazida zomveka bwino kwambiri, zopinga zachitsulo zidzagwiritsidwa ntchito, kutentha kwawo mpaka 10 mpaka 20ppm ndikosavuta, koma ndikokwera mtengo kwambiri.Mwachidule, muzochita zolondola za kalasi ya chida, kutentha kwa kutentha ndi gawo lofunika kwambiri, kutsutsa sikuli kolondola kungathe kusintha magawo kusukulu, kusintha kwa kukana ndi kutentha kwakunja sikuyendetsedwa.
Mapangidwe a resistor - kapangidwe ka resistor ndi zambiri, apa kutchula ntchito yomwe ingaganizidwe.Makina oyambira makina nthawi zambiri amagwiritsidwa ntchito kuyitanitsa aluminiyamu electrolytic yamphamvu kwambiri, kenako kutseka cholumikizira kuti muyatse mphamvuyo mutadzaza aluminium electrolytic.Chotsutsa ichi chiyenera kukhala chogonjetsedwa ndi mantha, ndipo ndi bwino kugwiritsa ntchito wirewound resistor yaikulu.Kuchuluka kwa mphamvu ya resistor sikofunikira kwambiri, koma mphamvu yanthawi yomweyo ndi yayikulu, ndipo zopinga wamba zimakhala zovuta kukwaniritsa zofunikira.Mapulogalamu apamwamba amagetsi, monga ma resistors a capacitor discharge, pomwe mphamvu yeniyeni yogwiritsira ntchito imaposa 500V, ndi bwino kugwiritsa ntchito zopinga zamphamvu za vitreous enamel m'malo motsutsa simenti wamba.Kugwiritsa ntchito mayamwidwe a spike, monga ma module oyendetsedwa ndi silicon pamakona onse awiri akuyenera kufanana ndi RC kuti achite mayamwidwe, kuchita chitetezo cha dv/dt, ndikwabwino kukwaniritsa zopinga za wirewound zosagwirizana, kuti mukhale ndi magwiridwe antchito abwino a spikes osati mosavuta. kuonongeka ndi zododometsa.
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