Cholakwika ndi kulumikizana kwa PCB?

Q: Zachidziwikire kuti kulimbikira kwa waya wamfupi kwambiri mkuzungulira kwakanthawi kochepa sikofunika?

A: When the conductive band of PCB bolodi imakulitsidwa, cholakwika chaphindu chidzachepetsedwa. M’mabwalo a analog, nthawi zambiri ndimakonda kugwiritsa ntchito gulu lonse, koma opanga ma PCB ambiri (ndi opanga ma PCB) amakonda kugwiritsa ntchito mulingo wocheperako wamagulu kuti athandizire kuyika mzere wazizindikiro. Pomaliza, ndikofunikira kuwerengera kukana kwa gulu lotsogolera ndikuwunika momwe ntchito yake ikuyendera pamavuto onse omwe angakhalepo.

ipcb

Q: Monga tanena kale za otsutsa osavuta, payenera kukhala ena otsutsa omwe magwiridwe awo ntchito ndi zomwe timayembekezera. Kodi chimachitika ndi chiyani kukana kwa gawo la waya?

Y: Zinthu nzosiyana. Mukutanthauza kwa wochititsa kapena gulu loyendetsa mu PCB lomwe limakhala ngati wochititsa. Popeza ma superconductors ofunda kutentha sanapezekebe, utali uliwonse wazitsulo umakhala ngati wotsutsana wotsutsa (womwe umagwiranso ntchito ngati capacitor ndi inductor), komanso momwe mphamvu yake ikuyendera m’deralo iyenera kuganiziridwa.

Cholakwika ndi zingwe za PCB

Q: Kodi pali vuto ndi kuthekera kwa gulu loyendetsa lokhala ndi m’lifupi kwambiri komanso chitsulo chosanjikiza kumbuyo kwa bolodi la PRINTED?

A: Ndi funso laling’ono. Ngakhale kuthekera kochokera pagulu loyendetsa la PRINTED dera bolodi ndikofunikira, ziyenera kuyerekezedwa kaye nthawi zonse. Ngati sizili choncho, ngakhale gulu lalikulu lopanga capacitance lalikulu silovuta. Ngati mavuto abuka, gawo laling’ono la ndege yapansi limatha kuchotsedwa kuti lichepetse mphamvu zapadziko lapansi.

Q: Ndege yoyikira ndi chiyani?

A: Ngati zojambulazo zamkuwa mbali yonse ya PRINTED dera board (kapena interlayer yonse ya multilayer yosindikizidwa board board) imagwiritsidwa ntchito kukhazikika, ndiye izi ndi zomwe timazitcha ndege yokhazikika. Mawaya aliwonse apansi azikonzedwa ndi zing’onozing’ono zotheka kukana ndikuchotsa. Ngati makina agwiritsira ntchito ndege yokwerera pansi, sizingakhudzidwe ndi phokoso lakumtunda. Ndipo ndege yokhazikitsira pansi imagwira ntchito yoteteza komanso kutentha.

Q: Ndege yoyikira yomwe yatchulidwa pano ndiyovuta kwa wopanga, sichoncho?

Y: Panali zovuta zina zaka 20 zapitazo. Lero, chifukwa chakusintha kwa binder, solder kukana ndi ukadaulo wa soldering m’mabwalo osindikizidwa, kupanga ndege yokhazikika kwakhala ntchito yayitali yama board osindikizidwa.

Q: Munanena kuti ndizokayikitsa kwambiri kuti dongosololi liziwonetsedwa ndi phokoso lapansi pogwiritsa ntchito ndege yapansi. Zotsalira zavutoli sizingathetsedwe?

Yankho: Ngakhale pali ndege yapansi, kukana kwake ndikulowerera sikuli zero. Ngati gwero lakunja ndilolimba, zingakhudze mbendera yeniyeni. Vutoli limatha kuchepetsedwa pokonzekera bwino ma board oyenda osunthika kuti magwero apamwamba asayende kupita kumadera omwe amakhudza mphamvu yama voliyumu olondola. Nthawi zina kupuma kapena kudula pakati pa ndege kumatha kupatutsa mphamvu yayikulu kuchokera kumalo ovuta, koma kukakamiza kusintha ndegeyo kumathanso kusunthira chizindikirocho kumalo ovuta, motero njira imeneyi iyenera kugwiritsidwa ntchito mosamala.

Q: Kodi ndingadziwe bwanji kutsika kwamagetsi komwe kumachitika mundege?

A: Kawirikawiri kutsika kwamagetsi kumatha kuyezedwa, koma nthawi zina kumatha kuwerengedwa kutengera kukana kwa ndege zomwe zili pansi komanso kutalika kwa gulu loyendetsa lomwe likuyenda pakadali pano, ngakhale kuwerengera kungakhale kovuta. Ma amplifiers azida atha kugwiritsidwa ntchito pama voltages mu DC mpaka low frequency (50kHz). Ngati mkuzamawu uli wosiyana ndi mphamvu yake, oscilloscope iyenera kulumikizidwa ndi mphamvu yamagetsi yamagetsi yogwiritsidwa ntchito.Kuunikira

Kulimbana pakati pa mfundo ziwiri zilizonse pa ndege yapansi kumatha kuwerengedwa powonjezera kafukufuku pamalingaliro awiriwo. Kuphatikiza kwamphamvu yama amplifier ndi chidwi cha oscilloscope kumapangitsa chidwi cha muyeso kufikira 5μV / div. Phokoso lochokera pama amplifier liziwonjezera mulingo wa mawonekedwe a oscilloscope waveve pafupifupi 3μV, komabe nkutheka kukwaniritsa chisankho cha 1μV, chomwe ndikokwanira kusiyanitsa phokoso lapansi kwambiri mpaka chidaliro cha 80%.

Q: Kodi mungayese bwanji phokoso lalitali kwambiri?

Yankho: Zimakhala zovuta kuyeza phokoso la pansi ndi chopangira choyenera cha wideband, chifukwa chake ma hf ndi ma VHF osayenera ndi oyenera. Amakhala ndi ferrite maginito mphete (wakunja awiri a 6 ~ 8mm) ndi koyilo awiri 6 ~ 10 akutembenukira aliyense. Kuti mupange chosinthira chodzichitira pafupipafupi, koyilo imodzi imalumikizidwa ndi kulowetsa kwa sipekitiramu ndipo inayo ku kafukufuku. Njira yoyeserayi ndiyofanana ndi kesi yocheperako, koma chowunikira chimagwiritsa ntchito matalikidwe amtundu wa matalikidwe kuyimira phokoso. Mosiyana ndi nthawi yayitali, magwero amawu amatha kusiyanitsidwa mosavuta kutengera mawonekedwe awo pafupipafupi. Kuphatikiza apo, chidwi cha chowunikira cha sipekitiramu ndichoposa 60dB kuposa cha Broadband oscilloscope.