Bowo lokhalo lili ndi mphamvu ya parasitic pansi. Ngati m'mimba mwake wa dzenje lodzipatula lomwe lili pansi pa bowolo limadziwika kuti ndi D2, kutalika kwa bowolo ndi D1, makulidwe a bolodi la PCB ndi T, ndi dielectric yosasinthasintha ya gawo lapansi. ndi ε, The parasitic capacitance of the via is about C=1.41 ε TD1/(D2-D1)
Chotsatira chachikulu cha parasitic capacitance pa dera lomwe limayambitsidwa ndi vias ndikuti limatalikitsa nthawi yazizindikiro ndikuchepetsa liwiro la dera. Mwachitsanzo, pa bolodi la PCB lokhala ndi makulidwe a Mil 50, ngati ma vias okhala ndi mainchesi amkati a Mil 10 ndi pad diameter ya Mil 20 amagwiritsidwa ntchito, ndipo mtunda wapakati pa pedi ndi mkuwa pansi ndi 32 Mil. , titha kuwerengera kuchuluka kwa parasitic capacitance ya vias pogwiritsa ntchito chilinganizo pamwambapa motere: C=1.41 x 4.4x 0.050 x 0.020/(0.032-0.020)=0.517pF, Kusintha kwa nthawi yoyambira chifukwa cha kuthekera uku ndi: T10-90 =2.2C (Z0/2)=2.2x0.517x (55/2)=31.28ps. Kuchokera pazikhalidwezi, zikhoza kuwoneka kuti ngakhale kuti mphamvu ya parasitic ya njira imodzi yodutsa ikhoza kukhala ndi zotsatirapo zochepetsera kukwera, kusamala kuyenera kuchitidwa ngati vias amagwiritsidwa ntchito kangapo mu wiring kwa interlayer kusintha.
Pamodzi ndi parasitic capacitance mu via, palinso parasitic inductance. The parasitic series inductance imafooketsa chopereka cha bypass capacitance ndikufooketsa kusefa kwadongosolo lonse lamphamvu. Njira yotsatirayi ingagwiritsidwe ntchito kungowerengera pafupifupi parasitic inductance kudzera:
L=5.08h [ln (4h/d)+1], pamene L amatanthauza kulowetsa kwa dzenje, h ndi kutalika kwa dzenje, ndipo d ndi m'mimba mwake wa dzenje lapakati. Kuchokera pa equation, zitha kuwoneka kuti m'mimba mwake mwa njirayo imakhudza pang'ono pa inductance, pomwe kutalika kwa via kumakhudza kwambiri inductance. Pogwiritsa ntchito chitsanzo chapamwambachi, inductance ya via imatha kuwerengedwa ngati L=5.08x0.050 [ln (4x0.050/0.010)+1]=1.015nH. Ngati nthawi yokweza chizindikiro ndi 1ns, ndiye kuti kukula kwake kofananako ndi: XL=π L/T10-90=3.19 Ω.
Powombetsa mkota:
Kusankha PCB yocheperako ndikopindulitsa pakuchepetsa magawo a parasitic
Yesetsani kuti musasinthe zigawo kapena kugwiritsa ntchito ma vias osafunika pamayendedwe azizindikiro
Boolani mabowo pafupi ndi magetsi ndi nthaka, ndipo mawaya ofupikitsa ndi okhuthala a mabowo ndi mapini, ndi bwino.
Ikani mabowo ambiri pafupi ndi chizindikiro chosinthira chizindikiro kuti mupereke dera lapafupi kwambiri la chizindikiro
Mukamapanga zinthu zingapo za fiber fiber, monga Optical module,ONU, Optical fiber module,OLTgawo, ndi zina zotero, muyenera kuganizira momwe vias pa bosa, kufalitsa diso chithunzi, kutha chiŵerengero, etc., kapena zotsatira kulandira tilinazo.
Zomwe zili pamwambazi ndizofotokozera mwachidule za "Introduction to Key Parameters of BOSA - kudzera kukula (II)", zomwe zingagwiritsidwe ntchito ngati zofotokozera. Kampani yathu ili ndi gulu lolimba kwambiri laukadaulo ndipo imatha kupereka chithandizo chaukadaulo kwa makasitomala. Pakadali pano, kampani yathu ili ndi mitundu yosiyanasiyana: yanzeruinu, gawo lolumikizana la kuwala, gawo la kuwala kwa fiber, sfp optical module,oltzida, Efanetikusinthandi zida zina zamaneti. Ngati mukufuna, mutha kuphunzira zambiri za iwo.
