Dorp-In Terminations RF Microwave

Nta:

Zaus siab
Kev Ntseeg Siab thiab Kev Ruaj Ntseg

Cov ntawv thov:

Wireless
Kev siv twj paj nruag
Radar

TIV TAUJ TAM SIM NO

Drop-In Termination (tseem hu ua surface-mount termination resistor) yog ib qho khoom siv surface-mount technology (SMT) uas tsim tshwj xeeb rau cov high-speed digital circuits thiab radio frequency (RF) circuits. Nws lub hom phiaj tseem ceeb yog kom tsis txhob muaj kev cuam tshuam ntawm cov teeb liab thiab xyuas kom meej tias cov teeb liab muaj kev ncaj ncees (SI). Tsis txhob txuas nrog cov xov hlau, nws ncaj qha "embedded" lossis "dropped in" ntawm cov chaw tshwj xeeb ntawm cov kab xa xov PCB (xws li cov kab microstrip), ua haujlwm ua ib qho parallel termination resistor. Nws yog ib qho tseem ceeb hauv kev daws teeb meem zoo ntawm cov teeb liab ceev ceev thiab siv dav hauv ntau yam khoom embedded, los ntawm cov computer servers mus rau cov khoom siv sib txuas lus.

Cov yam ntxwv:

1. Kev ua tau zoo heev thiab kev sib phim impedance meej
Ultra-Low parasitic inductance (ESL): Siv cov qauv ntsug tshiab thiab cov thev naus laus zis siab heev (xws li thev naus laus zis nyias-zaj duab xis), parasitic inductance raug txo qis (feem ntau yog cov nqi tiv thaiv tseeb: Muab cov nqi tiv thaiv raug thiab ruaj khov), xyuas kom meej tias qhov kawg impedance phim qhov impedance ntawm txoj kab xa xov (piv txwv li, 50Ω, 75Ω, 100Ω), ua kom lub zog ntawm lub teeb liab nqus tau zoo tshaj plaws thiab tiv thaiv kev cuam tshuam.
Cov lus teb zaus zoo heev: Tswj cov yam ntxwv tsis kam ruaj khov hla ntau qhov zaus, ua tau zoo dua li cov resistors axial lossis radial lead ib txwm muaj.
2. Kev tsim qauv tsim los rau kev koom ua ke PCB
Cov qauv ntsug tshwj xeeb: Cov dej ntws tam sim no yog perpendicular rau qhov chaw ntawm PCB board. Ob lub electrodes nyob rau sab saum toj thiab hauv qab ntawm cov khoom, txuas ncaj qha rau cov hlau txheej thiab av txheej ntawm txoj kab xa xov, tsim txoj kev tam sim no luv tshaj plaws thiab txo qhov inductance ntawm lub voj voog uas tshwm sim los ntawm cov resistors ib txwm muaj.
Cov thev naus laus zis txheem ntawm qhov chaw (SMT): Sib xws nrog cov txheej txheem sib dhos tsis siv neeg, tsim nyog rau kev tsim khoom loj, txhim kho kev ua haujlwm zoo thiab kev sib xws.
Me me thiab txuag qhov chaw: Cov pob me me (piv txwv li, 0402, 0603, 0805) txuag tau qhov chaw PCB muaj nqis, ua rau nws zoo tagnrho rau cov qauv tsim ntawm cov laug cam siab.
3. Kev tswj hwm fais fab loj thiab kev ntseeg siab
Kev siv hluav taws xob zoo: Txawm hais tias nws me me, tus qauv tsim no suav nrog kev siv hluav taws xob, ua rau nws tswj tau cua sov uas tsim tawm thaum lub sijhawm teeb liab ceev ceev. Muaj ntau qhov ntsuas hluav taws xob (piv txwv li, 1/16W, 1/10W, 1/8W, 1/4W).
Kev ntseeg siab thiab ruaj khov: Siv cov khoom siv ruaj khov thiab cov qauv ruaj khov, muab lub zog zoo heev, tiv taus kev poob siab thermal, thiab kev ntseeg siab mus sij hawm ntev, ua rau nws tsim nyog rau cov ntawv thov kev lag luam uas xav tau.

Cov ntawv thov:

1. Kev xaus rau cov tsheb npav digital ceev ceev
Hauv cov tsheb npav sib luag ceev ceev (piv txwv li, DDR4, DDR5 SDRAM) thiab cov tsheb npav sib txawv, qhov twg cov nqi xa tawm teeb liab siab heev, Drop-In Termination resistors raug muab tso rau ntawm qhov kawg ntawm txoj kab xa tawm (qhov kawg xaus) lossis ntawm qhov chaw (qhov chaw xaus). Qhov no muab txoj hauv kev qis-impedance mus rau lub zog hluav taws xob lossis hauv av, nqus cov teeb liab lub zog thaum tuaj txog, yog li tshem tawm kev cuam tshuam, ntxuav cov teeb liab waveforms, thiab ua kom muaj kev sib kis cov ntaub ntawv ruaj khov. Qhov no yog nws daim ntawv thov classic thiab dav tshaj plaws hauv cov modules nco (DIMMs) thiab cov qauv motherboard.
2. Cov voj voog RF thiab microwave
Hauv cov khoom siv sib txuas lus wireless, radar systems, cov cuab yeej kuaj, thiab lwm yam RF systems, Drop-In Termination yog siv ua qhov sib phim ntawm qhov tso zis ntawm cov khoom faib fais fab, couplers, thiab amplifiers. Nws muab tus qauv 50Ω impedance, nqus cov zog RF ntau dhau, txhim kho kev cais channel, txo cov kev ntsuas yuam kev, thiab tiv thaiv kev cuam tshuam lub zog los tiv thaiv cov khoom RF rhiab heev thiab xyuas kom meej tias lub kaw lus ua haujlwm zoo.
3. Kev sib txuas lus ceev ceev
Hauv cov xwm txheej uas cov xov hlau ntawm lub rooj tsavxwm ntev lossis cov topology nyuaj, xws li PCIe, SATA, SAS, USB 3.0+, thiab lwm yam kev sib txuas lus ceev ceev nrog cov kev cai zoo ntawm lub teeb liab, cov khoom siv sab nraud Drop-In Termination zoo siv rau kev sib phim zoo.
4. Cov khoom siv sib txuas lus thiab kev sib txuas lus
Hauv cov routers, switches, optical modules, thiab lwm yam khoom siv, qhov twg cov kab teeb liab ceev ceev ntawm backplanes (piv txwv li, 25G +) xav tau kev tswj hwm impedance nruj, Drop-In Termination siv ze ntawm cov connectors backplane lossis ntawm qhov kawg ntawm cov kab xa mus ntev kom ua kom zoo dua qhov kev ncaj ncees ntawm cov teeb liab thiab txo qhov yuam kev me ntsis (BER).

Qualwavecov khoom siv Dorp-In Terminations npog qhov zaus DC ~ 3GHz. Qhov nruab nrab ntawm kev tswj hwm lub zog yog txog li 100 watts.