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DELPHI的笔试题
作者：佚名 来源：不详 发布时间：2007-5-4 14:04:00
系统, 零部件和模块。今天成电的就业办老师介绍说，德尔福是汽车界的华为，从来不在
媒体上打广告。
大家看看从美国空运过来的笔试题目
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)
TO220 50 35
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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