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# SRM University 2007 B.Tech Information Technology EC205 -- ELECTRONIC CIRCUITS - I - Question Paper

Wednesday, 30 January 2013 07:20Web
29. Draw the small signal equivalent of FET.
30. Draw the voltage controlled current source equivalent of FET.
31. Draw the voltage controlled voltage source equivalent of FET.
32. Give the transconductance of FET.
33. Give the amplification factor of FET.
34. Give the output resistance of FET.
35. Determine the maximum value of gm and value of gm at vgs = -0.5 and –1.5 for the JFET with IDSS = eight mA and vp= - four v.
Part - B
1. Obtain the hybrid parameters of a linear circuit.
2. Obtain the hybrid parameters of a CE configuration transistor.
3. Obtain the hybrid parameters of a CB configuration transistor
4. Obtain the hybrid parameters of a CC configuration transistor
5. Determine the hybrid parameters of a transistor practically and graphically.
6. Derive the current gain, voltage gain, input resistance, output resistance of Common-Emitter configuration using exact analysis.
7. Derive the current gain, voltage gain, input resistance, output resistance of Common- Base configuration using exact analysis.
8. Derive the current gain, voltage gain, input resistance, output resistance of Common- Collector configuration using exact analysis.
9. Derive the current gain, voltage gain, input resistance, output resistance of Common-Emitter configuration using approximate analysis.
10. Derive the current gain, voltage gain, input resistance, output resistance of Common- Base configuration using approximate analysis.
11. Derive the current gain, voltage gain, input resistance, output resistance of Common- Collector configuration using approximate analysis.
12. Derive the current gain, voltage gain, input resistance, output resistance of FET.
13. A voltage source VS of internal resistance RS =500? drives a CE amplifier with RL = 2000?. The hybrid parameters are hie = 1100?; hre = 2.5×10-4; hfe =50; hoe= 25µA/v. calculate voltage gain, current gain, input resistance, output resistance using exact analysis.
14. A CC amplifier is fed with voltage source VS of internal resistance RS = 800 ?. The load resistance RL = 1600?. The CE hybrid parameters are hie = 1000?; hre = 2.2×10-4; hfe = 55; hoe = 23µA/v. calculate voltage gain, current gain, input resistance, output resistance using approximate analysis.
15. A voltage source VS of internal resistance RS =900? drives a CB amplifier with RL = 2000?. The CE hybrid parameters are hie = 1200 ?; hre = 2×10-4; hfe = 60; hoe = 10µA/v. calculate voltage gain, current gain, input resistance, output resistance using exact and approximate analysis.