Department of Physics,

SavitribaiPhule Pune University, Pune-07

Fundamentals of Electronics (PHY 510 MJ)
Tutorial No. I Date: 5-8 Aug. 2024
1. Find tlhe equivalent resistance between two points X and Y:
Ww
30.2
w
2052 40.)
X 1002 W
w 4052

W
502 6052
702
Ww
2. Calculate effective resistance between points A and B:

wwww 2092 W ww
302
w
402
W
Wwwww

202 602 6052 2062

Ww

20. 502 5092

w -OB
302

3. Determine the current supplied by each Battery:

w
502 4052 8092
30V

302 2052 30V

20V
50V 50V
 4. Use superposition theorem to find the current through the 202 resistance
w w
152 ww 62

5V) 2092
lov
3S2

5. Find the current I2, by applying

Thevenin's theorem.
w w
5092 www 1092 12092
www

12V= 152 802

}15V

6. Find the current through 22 resistance using

Norton's theorem.
ww -w
12 ww 12

12V = 2S2
6V

7. Find the value of RL for maximum power transfer and magnitude of maximum
power dissipated by the resistance, R.
w
20S2 R,
-
2052 -12V

6V
w
2092
 Department of Physics,
Savitribai Phule Pune University, Pune-07
Fundamnentals of Electronics (PHY 510 MJ)
Tutorial No. II Date: 12-16'h Aug. 2024

1. Draw the energy band diagram for a) p-n junction under forward and reverse
bias conditions and b) n-p-n transistor with and without battery conditions.
2 Consider a p-n junction at 300 Kwith doping concentration of Na =1.5 X
1018 cm and Np 2 X 10 cm'in the pandn side, respectively. Determine
the contact potential across the junction. Assume intrinsic carrier
concentration n, =2.5 X 101 cm at 300 K.
3. Discuss the difference between Ic, IE and Ip from that of ic, ie and ib,
respectively. Explain also difference between ac and DC emitter current.
4. Draw the circuit diagram for common emitter configuration. Explain how
the ac signal given at the base amplified at the collector end.
5. Draw the circuit diagram for common base and common collector

configuration. Explain its characteristics.

6. Calculate IB, Ic, IE, VB, Ve and VE in the following circuits:
o 10V 18V
3.3k
5k
60k
40k
50k ww B=100
ww B=120
1.8k
8.7V
3k

(a) (b)
7. Calculate l, lc, IE, VB, Ve and V[ in the following circuits:
o +20V -o 16v -10V
8.2kC2 1kQ 3.6kS2
10k 2 10k 2

1k (2 +2V 2.2k C2 1k 2
2000)
1ka
oB

(a) (b) (c)

 8. For the common base circuit shown in Fig.,
the transistor to be of silicon. determine lc and VCB. Assume

R=1.5 ks2
Rç= 1.2 kn
VEE= 8 V I
Vcc= 18 V
I
9. Determine the Q point of the transistor circuit shown in Fig. Also
dc load line. Given ß = 100 and draw the
VBE 0.7V.
+ Vcc 9 + 10V

lk2
Rc
Rg
47 k

R 4.7 kQ

- VEE - 10V
10. What is the effect of temperature on transistor? What is
thermal runaway?

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 Department of Physics,
Savitribai Phule Pune University, Pune-07
Tutorial No. III
Fundanentals of Elcctronics (PHY 510MJ)
Date: 19-23rd Aug. 2024
Draw the DCand ac load line for the following
of operating point, Q. Vcc= 12 V, circuit. Find the coordinates
KQ. Vin=l mV. RÊ=7KO, R=5 KQ, Re=2 KQ, RE=1
R=4 R =3k

Ri
ic
Cn

R RE CE

2
Estimate the voltage gain and output voltage for the above circuit with Vcc =
15 V, R1=9KQ, R2=6KO, Re=2 KO,RE= 1KQ. Vin=1mV.

3. Estimate input impedance, output impedance, voltage gain and peak

voltage for the following amplifier. Vcc =12 V, RË =KQ, R= 5 KQ,
output
Re= 2 KQ, R¸= 1KQ and RL = 10 KQ. Vin =1 mV.

+Voc

Rc
R C
-4AAAA

Voul

(mw
 outpu
output voltage, input impedance and
gain,
4. Estimate voltage
impedance. - 15/

10ks
p=125

2mV () 2ks2
p-p 1kS2
1k2

voltage for the following

5 Find input impedance, output impedance, output
circuits. Vout
Vin=20mV

3kS2
ww
Ri
w O18V
12k2
R gk2

and estimete t'he

Draw the DC and ac load-line fo! the following circuit
pcwer
maximum value of the peak to peak output voliage. Estimate also
delivered to the load and the power gain for tlhe given input signal.
-Q 20
5kS2

10ks2 0 Vout

p=100

Sks2 20002

Vin=15mV (~) 4k2

(rrs)
 Department of Physics,
Savitribai Phule Pune University, Pune-07
Tutorial No. IV-V Fundamentals of Electronics (PHY 510 MI)
Date: 26th- 29th Aug. 2024
1. Explain the impact of Early effect on the
amplifier. How can it be mitigated? performance of a transistor
2 Derive the small-signal equivalent
explain the significance of each circuit for a common emitter amplifier and
3. component.
Discuss the role of the coupling and
circuit. bypass in a capacitors transistor amplifier
4 Derive the expression for the
an emitter resistor and discussvoltage gain of a common emitter amplifier with
the effect of emitter
Find Vout degeneration on the gain.
Vcc
10 V
R,
R, 3.G kL)
10 ks2 S
Vout

2.2 k)

6. Find Vout
Vcc
o10
R
3.6 ko
10 knS
RG
600 2
|Yout
p= 100
10 K2

Im 2210 RE

1 1 kO

7. Find Vout

3.6 k2

R J= 100
600 2

()s0 mv
R
B20525
 Department of Physics,
Savitribai Phule Pune University, Pune-07
Fundamentals of Electronics (PHY 510 MJ)
Date: 9-19th Sept. 2024
Tutorial No. VII

1. Find Vc1, Vcz, VE, Ig and I,? +15V

+15V

10k2
10k
10k
-Vout
+
Vci -o Vout O Vc

15k2
15k

-15V -15V

(a) (b)
2. Findr'e, Av, Vout and Zn(base)?
+15V
+15V

8k0
8k2
8k2
Vout
Vc1
ImV
ImV

15k2
15k

-15V -15V

(I) (II)
+15V
+15V

8k2
8ks2 8k2
Vout
VCI
2my lmy 2mV
1mV

1Sk 15k2

-15V -15V

(III) (IV)
3. Discuss the concept of Common Mode Rejection Ratio, CMRR, and why it is
important in differential amplifiers. Estimate the CMRR for the following circuit
when the (a) Common mode signal is 10 mV and (b) Diferential Input Voltage is 5
mV.
+15V

30k2 30k2

www
30ks2

-15V

4 Determine load voltage and input impedance for the following circuit.
+15V

50kS2 50k2

Ww
R=40kS
Vin)1=10my = 0V

80kS2

-15V
5. How does the slew rate of a differential amplifier affect its performance, particularly
in high-speed applications?
6. Explain the effect of resistor mismatch on the performance of a differential amplifier

7. Discuss some common applications of differential amplifiers.