EC6304 – ELECTRONIC CIRCUITS –I
UNIT – 2
PART - B
1. Explain in detail about Miller’s theorem.
2. Draw the small signal model (hybrid model) of a CE amplifier with and
without un -bypassed emitter resistors. Also derive the equation of Current
gain, voltage gain, input impedance and output impedance.
3. Draw the circuit of emitter coupled BJT differential amplifier and explain
the operation.
Also derive the expression of its CMRR with the help of its small signal
model.
4. Explain the methods ( Darlington Pair and Bootstrap connections )of
increasing input impedance.
5. Write notes on Multistage Amplifiers with its types (Cascade and Cascode
connections).
6. Draw and Compare CE,CB,CC amplifiers in terms of its gains and
impedances.
7. Problems.
EC6304 – ELECTRONIC CIRCUITS –I
UNIT – 2
PART – A
1. State Miller’s theorem. (of impedance and capacitance)
2. State bisection theorem.
3. Draw small signal model (hybrid model) of CE amplifier and mention its
h-parameters.
4. Draw small signal model of CC and CB amplifiers.
5. Draw a BJT Darlington pair and mention its advantages.
6. Mention two important characteristics of CC and CB circuit.
7. What are small signal amplifiers?
8. Give the reason for the improvement of CMRR in the amplifiers.
9. Define CMRR. Write its expression in dB.
10. Mention the methods to improve the CMRR.
11. What do you mean by differential mode and common mode gains?
12. What is differential amplifier? Write the advantages of differential
amplifier.
13. Express the output voltage of a differential amplifier in terms of CMRR.
14. What are the methods used to improve input impedance?
15. Write the types of coupling used in multistage amplifier.
16. What does bootstrapping mean?
17. What are the different configurations of differential amplifier?
18. What are the methods used to improve input impedence?
19. What is known as A.C load line?
20. Why CB amplifier is preferred for high frequency signal compared to CE
amplifier?