DEPARTMENT OF ELECTRICAL AND ELECTRONIC
ENGINEERING
2023/2024 SEMESTEREXAMINATION
Course Title: ELECTRONICS II
Course code: EEC 234
Time allowed: 2hours
Instruction: Answer any FOUR(4) Questions
1(a) With the aid of appropriate circuit diagram explain the output characteristics of Field
Effect Transistor (FET) electronic device.
(b) Distinguish between Active electronic device and passive
(b) Explain how to measure AC voltage and D. C voltage.
2. (a) Mention and explain 4 application of FET
(b) Differentiate between a BJT and FET device
(c) Explain with diagram biasing procedure for a rectifier diode.
3. (a) Withandofdiagram,draw3circuitconfigurationsforTransistoramplifier.
(b) Explain how a FET can be used as Amplifier
(c) ExplainbiasingproceduresforPNPtransistorusingappropriateblockdiagram.
4. (a)
Usingschematicsymbolicdiagramrepresentiationdifferentiatebetweenthefollowing:
(i) Fectifier diode and zener diod
(ii) Fix value resistor and variable value resistor
(iii) NPN transistor and PNP transistor
(iv) N-channel FET and p-channel FET
(b) Designa15vDCpowersupplytopowerapublicAddresssystem(PAS)
5. (a) ExplainhowcommonEmitter(CE)transistorcircuitconfigurationcanbeusedas
amplifier
(b) Mention and define types of Amplifier circuit gains
(c) Decribe an electronic Oscillator and give example.
6. (a) DistinguishbetweenvoltagecontrolleddeviceVCD)andcurrentcontrolleddevice
(CCD)
(b) Differentiate between Analog System and Digital System.
(c) Given IDSS = 32mA, VGS(off) = 8v, VGS = 4.5V.
Parameters of a FET device. Calculate the drain current (ID)
(d) Mention and explain 6 applications of an oscillator
(e) Explainreasonwhy crystal oscillator iswidelyusedin electroniccommunication
systems.
