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德?tīng)柛５娜⒐P試題目
德?tīng)柛＜瘓F是全球最大的汽車(chē)系統和零部件生產(chǎn)制造商, 為客戶(hù)提供品種齊全的汽車(chē)系統, 零部件和模塊。今天成電的就業(yè)辦老師介紹說(shuō)德?tīng)柛Ｊ瞧?chē)界的華為從來(lái)不在媒體上打廣告。大家看看從美國空運過(guò)來(lái)的筆試題目。
1Name 3 Vehicle Buses.
2Name 2 possible sources of Electromagnetic interference on Electronics Circuit ASM.
3Wavelength for 12MHz frequency signal is____
4Name 2 important considerations for car radio performance related to audio signal processing under multipath condition?
5What is the typical FM receiver RF signal strength to achieve 30dB S/N for car radio?
6When a radio is tuned to 98.1 MHz & with a LO of 108.8 MHz, what is the image frequency?
7For a system with a matched impedance, what is the Reflection Coefficient and SWR?
8Which property of the output capacitor is the primary cause of Low Drop Out (LDO) regulator loop instability?
a) Equivalent series resistance(ESR)
b) Effective series inductance(ESL)
c) Capacitance value
d) Dielectric material
9The switching regulator is capable of:
a) Higher power conversion efficiency
b) Providing an output voltage that is higher than the input
c) Generating an output boltage oppsite in polarity to the input
d) All of the above
10A linear regulator op*(沒(méi)抄清楚)
Vin(max)=10v,Vout(min)=4.8v,Iout(max)=2.5mA,Iq(max)=2.5mA,Ta(max)=8.5攝氏度The regulator is available in 3 packages.Each package has the following thermal characteristics:
Package Rja(攝食度/W) Rjc(攝食度/W)
TO220 50 35
SO14 125 30
D1P8 100 52
Choose the most suitable package to handle the power dissipation requirement without a heat sink and why.
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