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    英国电信 2021 通信面试题

    小编:管理员 521阅读 2021.10.10

    第1题:

    Name 3 Vehicle Buses.



    第2题:

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



    第3题:

    Wavelength for 12MHz frequency signal is____



    第4题:

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



    第5题:

    What is the typical FM receiver RF signal strength to achieve 30dB S/N for car radio?



    第6题:

    When a radio is tuned to 98.1 MHz & with a LO of 108.8 MHz, what is the image frequency?



    第7题:

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



    第8题:

    Which property of the output capacitor is the primary cause of Low Drop Out(LDO) regulator loop instability?

    (1)Equivalent series resistance(ESR)

    (2)Effective series inductance(ESL)

    (3)Capacitance value

    (4)Dielectric material




    第9题:

    The switching regulator is capable of:

    (1)Higher power conversion efficiency

    (2)Providing an output voltage that is higher than the input

    (3)Generating an output boltage oppsite in polarity to the input

    (4)All of the above




    第10题:

    A linear regulator op 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 thermal characteristics:

    Package Rja(摄氏度/W) Rjc(摄氏度/W) 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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