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Delphi试题2

作者：佚名  来源：不详  发布时间：2007-5-4 14:04:00
1、Name 3 Vehicle Buses.
2、Name 2 possible sources of Electromagnetic interference on Electronics
Circ
uit 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
ima
ge frequency?
7、For a system with a matched impedance, what is the Reflection
Coefficient a
nd 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*(没抄清楚)
  Vin(max)=10v,Vout(min)=4.8v,Iout(max)=2.5mA,Iq(max)=2.5mA,Ta(max)=8.5摄氏度
，

  The regulator is available in 3 packages.Each package has the following
ther
mal characteristics:
Package            Rja(摄食度/W)           Rjc(摄食度/W)
SO14                  125                       30
D1P8                  100                       52
    Choose the most suitable package to handle the power dissipation
requireme
nt without a heat sink and why.

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