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1、德尔福英文笔试题分享 1、Wavelength for 12MHz frequency signal is _ 2、Name 2 importa nt con sideratio ns for car radio performa nee related to audio sig nal process ing under multipath con diti on?3、Name 3 Vehicle Buses.4、Name 2 possible sources of Electromagnetic in terfere nee on Electr on ics Circuit ASM.5、W
2、hat is the typical FM receiver RF signal strength to achieve 30dB S/N for car radio?6、When a radio is tuned to 98.1 MHz with a LO of 108.8 MH z,what is the image freque ncy?7、For a system with a matched impedanee,what is the Reflection Coefficie nt and SWR?8、A linear regulator op*(没抄清楚)Vin(max)=10v,
3、Vout(mi n)=4.8v,lout(max)=2.5mA,lq(max)=2.5 mA,Ta(max)=8.5 摄氏度，The regulator is available in 3 packages.Each package has the follow ing thermal characteristics:Package Rja(摄食度/W)Rjc(摄食度/W)TO220 50 35 S014 125 30 D1P8 100 52 Choose the most suitable package to han die the power dissipati on requireme
4、 nt without a heat sink and why.9、Which property of the output capacitor is the primary cause of Low Drop Out(LDO)regulator loop in stability?a)Equivale nt series resista nce(ESR)b)Effective series in ducta nce(ESL)c)Capacita nee value d)Dielectric material 10、The switching regulator is capable of:a)Higher power conv ersi on efficie ncy b)Providing an output voltage that is higher than the in put c)Gen erati ng an output boltage oppsite in polarity to the in put d)All of the above