STUPIDSID
Attempt any five:
1 (a)
Calculate the CMRR (in dB) for the circuit measurements of VD=1 mV, VO-D=120 mV, and VCM=1 mV, VO-CM=20 μV.
5 M
1 (b)
For an op-amp having a slew rate of SR=2.4 V/μs, what is the time taken for output to change from -15 V to +15V.
5 M
1 (c)
Determine VO for the following clamper circuit.
5 M
1 (d)
Given IDSS=16 mA and VP=-5 V, sketch the transfer characteristics using the data points. Determine the value of ID at VGS=-3 V from the curve and compare it to the value determined using Shockley's equation.
5 M
1 (e)
Crossover distortion behaviour is characteristic of Class A Power amplifier. State true or false with reason.
5 M
1 (f)
Compare class A, class B and class C power amplifier based on,
i) Output waveform for collector current
ii) Linearity
iii) Distortion
iv) Efficiency
i) Output waveform for collector current
ii) Linearity
iii) Distortion
iv) Efficiency
5 M
2 (a)
Determine output voltage. Assume, VB1=8V, VB2=6V and input to be sine wave of 20 V peak.
8 M
2 (b)
For the Zener diode network, determine VL, VR, IZ and PZ. Consider supply voltage of 16 v, zener voltage of 10 V, series resistor of 10 K and load resistance of 3 K.
8 M
2 (c)
Explain working of bridge rectifier.
4 M
3 (a)
Determine the levels of ICQ and VCEQ for the CE BJT amplifier with voltage-divider configuration. Consider R1=82K, R2=22 K, RC=5.6 K, RE=1.2 K, VCC=18 v and β=50.
8 M
3 (b)
Explain construction and working of D-MQSFET.
8 M
3 (c)
What is harmonic distortion? Write the equation for total harmonic distortion.
4 M
4 (a)
Determine the higher cut off frequencies for the given circuit diagram. \[ C_G = 0.01 \ \mu F, \ \ C_C =0.5 \ \mu F, \ \ C_S=2 \ \mu F, \ \ R_{SIG}=10 \ k, \\ R_G=1 \ M, \ \ R_D \ 4, \ 7 \ k, \ \ R_S=1 \ k, \ \ R_L = 2.2 \ K, \ \ I_{DSS} = 8 \ mA, \ \ V_P=-4 \ V, \\ rd=\infty, \ V_{DD}=20 \ V, \ \ C_{gL}=2 \ pF, \ \ G_{gs}\ 4 \ pF \ \ C_{ds}=0.5 \ pF, \ \ C_{wi} = 5 \ pF, \\ C_{wo}=6 \ pF, \ \ Av=-3. \]
10 M
4 (d)
Derive equation for three Op Amp Instrumentation amplifier. Give advantages and applications of Instrumentation amplifier.
10 M
5 (a)
Draw and explain a series voltage regulator.
10 M
5 (b)
Explain integrator using Op Amp. Draw its frequency response. State disadvantages of basic integrator and how it is overcome in practical integrator circuit.
10 M
6 (a)
Derive the expression for output voltage and hence determine the output voltage when V1=-V2=1V.
5 M
6 (b)
Derive the expression for output voltage and hence calculate the output voltage if V1=-0.2 V, V2=0.1 V.
5 M
6 (c)
Derive the expression for output voltage and draw the output voltage for this circuit with a sinusoidal input of 2.5mV.
5 M
6 (d)
Derive the expression for output voltage and draw the output voltage for this circuit with a sinusoidal input of 120 μV.
5 M
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