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Npaj-txheej txheem ntawm rooj vag ntu Kev tsim qauv

Mar 11, 2019

Kawm field-programmable gate arrays (FPGAs) muaj cov kev pabcuam loj ntawm cov rooj vag log thiab cov txheej txheem ntawm RAM kom siv cov lej ntawm cov lej. Raws li FPGA designs ntiav cov I / O cov nqi ceev heev thiab cov kab lus qhia cov npav, nws yog ib qho kev sib tw kom paub tseeb cov sij hawm siv tau cov ntaub ntawv hauv lub sijhawm teeb thiab tuav lub sijhawm.


Kev npaj rau pem teb pab kom muaj kev faib nyiaj hauv FPGAs kom tau raws li cov sij hawm no. FPGAs tuaj yeem siv los siv cov kev ua haujlwm ntawm lub peev xwm uas ua rau ASIC ua tau. Lub peev xwm los hloov cov kev ua haujlwm tom qab xa khoom, ib feem rov tsim kho ntawm ib feem ntawm cov qauv tsim thiab cov nqi qis dua uas tsis yog rov ua dua rau ASIC tsim (txawm li cas los ntawm tus nqi siab feem ntau), muab qhov zoo rau ntau cov ntawv.


Qee cov FPGAs muaj cov qauv zoo sib xws hauv cov zauv digital. Qhov feem ntau ntawm cov khoom analog yog ib tus qhwv ntsej muag ntawm txhua tus zis, uas yog tus engineer kom khwv tau cov nqi qis ntawm cov khoom ntim qis uas yuav tsis muaj suab paj nruag los sis ob peb tus neeg tsis tsim nyog, txwv tsis pub khiav qeeb heev. Tsis tas li ntawd yog quartz-crystal oscillators, nyob rau hauv-nti tsis muaj peev xwm ua tau-oscillators, thiab theem-xauv loops nrog embedded voltage-oscillators siv rau lub sijhawm tiam thiab kev tswj thiab rau high-speed serializer-deserializer (SERDES) kis cov ntiv taw thiab txais xov rov qab . Feem ntau yog cov sib piv sib txawv ntawm cov tswv yim uas tsim los txuas nrog rau cov kev qhia sib txawv. Muaj ob peb tug "mixed signal FPGAs" muaj kev sib txuas ntawm cov tshuab txuas rau digital (ADCs) thiab digital-to-analog converters (DACs) nrog analog lub teeb nyem cua pub rau lawv khiav lag luam raws li system-on-a-chip (SoC) . Cov kev pabcuam zoo li no yog qhov kab ntawm FPGA, uas yog cov uas yog cov digital thiab zeros ntawm nws cov kev pabcuam hauv internal interconnect npuag, thiab qhov chaw ua haujlwm analog array (FPAA), uas yog qhov tseem ceeb ntawm nws tus qauv hauv kev sib txuas.