全英版筆試題目（汽車(chē)零件生產(chǎn)商）

德?tīng)柛＜瘓F(tuán)是全球最大的汽車(chē)系統(tǒng)和零部件生產(chǎn)制造商,
1、Name 3 Vehicle Buses.

2、Name 2 possible sources of Electromagnetic interference on Electronics Circuit ASM.

3、Wavelength for 12MHz frequency signal is____

4、Name 2 important considerations for car radio performance related to audio　signal processing under multipath condition?

5、What 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 MHz, what is the image frequency?

7、For a system with a matched impedance, what is the Reflection Coefficient and SWR?

8、Which 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

9、The 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

10、A 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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