EC-I
2 MARKS
QB 1 New
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Define CMRR. How to improve it?
Pg.no.2.90 Q.no2
Illustrate the main idea of compensation techniques?
Pg.no 1.111 Q.no 6
Define Rise time
It is the time required for a signal to change from 10% value to a 90% of its value
Define Load regulation and line regulation.
Pg.no 5.8 no.1 and 2
What is bandwidth of an amplifier?
It is defined as the difference upper cut off frequency and lower cut off frequency
BW=fH –fL
What are the types of switching regulator?
 Step down or Bulk switching regulator
 Step up or Boost switching regulator
 Inverting type switching regulator
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Predict the collector and base current for the given specifications hfe = 80 , VBE(ON) = 0.7v, Rc=5K,
Rb=10K, Vcc=5V
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Categorize the different methods of biasing a JFET?
Pg.no 3.83 Q.no 17
What is transconductance? Give its expression.
Pg.no 3.83 Q.no 21
What are the types of transistor biasing?
Fixed bias , Self bias and Voltage Divider Bias
Figure out when thermal runway happens at the amplifier circuit?
Pg.no 1.112 Q.no13
Identify the operating regions of N-channel MOSFET and how do you identify the operating region?
Operating Region
Condition to identify operating region
Cut off region
0<VGS< VTH
VGS ≥ VTH
Linear of Non saturation region
VDS < VGS - VTH
Saturation region
VDS > VGS - VTH
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How would you apply various conditions for thermal stability and What are the conditions for thermal
stability?
Pg.no 1.112 Q.no 10
Compare CS, CG & CD MOSFET amplifier.
Pg.No.3.81. Q.no 13
Compare CS, CG & CD FET amplifier.
Pg.No.3.82. Q.no 14
List out the advantages of using emitter resistance in the context of biasing?
Pg.No1.118. Q.no 29
What is a cascade amplifier? List out its features.
Pg.no.2.94 q.no 20 & 22
Define BiCMOS.
Pg.no 3.80 Q.no 10
What are octaves and decades in frequency response?
Pg.no. 4.81 Q.no.18
Define the term biasing and mention its need. Pg.no 1.3
CT 1
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List out the three stability Factor?
Pg no 1.110 Q.no 1
How do you find the expression for stability Factor?
Pg.no 1.118 Q.no 30
What is dc load line?
DC load line for a transistor circuit is a straight line drawn on the output characteristics of transistor.
For CE transistor, dc load line is a graph of collector current IC versus collector emitter voltage VCE
How would you explain FET is known as voltage variable resistor?
FET acts as VVR in ohmic region where rd is controlled by VGS
Why CE configuration is widely used in amplifier circuit?
Bcoz it has high current gain and vtg gain
What is an amplifier?
An amplifier is an electronic circuit which increases the voltage, current, or power of a signal applied as
an input to it.
Construct the small signal AC equivalent circuit of the BJT?
Pg.No 2.91 Q.no3
Analysis the need of differential amplifier?
Whenever it is necessary to amplify the difference between the two signals and to eliminate the effect of
common mode signals such as unwanted interference and noise, the differential amplifier is necessary
Design a cascade amplifier and its ac equivalent circuit?
Both diagrams on Pg.no 2.47
Summarize the bootstrapping technique?
Pg.No.2.93 Q.no 15
Model set 1
What is a Q-point?
What is the impact of temperature on drain current of MOSFET?
What is an ac load line?
Draw the small signal ac equivalent circuit of the BJT.
What is the impact of including a source resistor in the FET amplifier?
Why multistage amplifiers are required?
What is the reason for reduction in gain at lower and higher frequencies in case of amplifiers?
Determine the unity gain bandwidth of a FET with parameters, Cgd=10pF, Cgs=50pF and gm=1.2mA/V
What is a bleeder resister? State its use.
Define Transformer Utilization Factor. State its value for HWR and FWR.
Model set 2
Why is the operating point selected at the centre of the operating region?
Give the methods of biasing a JFET.
What is the need of load line?
Draw a cascade amplifier and its equivalent structure.
What is body effect in MOSFET? How does it change the small-signal equivalent circuit of the MOSFET?
Give the general conditions under which common source amplifier would be used.
A bipolar transistor has parameter β0=150, Cπ=2pF, Cµ=0.3pF and is biased at ICQ=0.5mA. Determine the beta
cut off frequency.
Sketch the expanded hybrid π model of the BJT
What are the advantages of SMPS?
Compare the performance of Half wave and Full wave rectifier.
For Model set 1 & 2 Ans key Already sent