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DEPARTMENT OF ECE

LAB OBSERVATION / MANUAL

SEMESTER : III SEM

SUBJECT CODE : EC 6311

SUBJECT : ANALOG AND DIGITAL CIRCUITS LABORATORY

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EC6311 ANALOG AND DIGITAL CIRCUITS LABORATORY L T P C

0 0 3 2

LIST OF EXPERIMENTS

LIST OF ANALOG EXPERIMENTS:

1. Frequency Response of CE / CB / CC amplifier

2. Frequency response of CS Amplifiers

3. Darlington Amplifier

4. Differential Amplifiers- Transfer characteristic.

5. CMRR Measurment

6. Cascode / Cascade amplifier

7. Determination of bandwidth of single stage and multistage amplifiers

8. Spice Simulation of Common Emitter and Common Source amplifiers

LIST OF DIGITAL EXPERIMENTS 9. Design and implementation of code converters using logic gates

(i) BCD to excess-3 code and vice versa

(ii) Binary to gray and vice-versa

10. Design and implementation of 4 bit binary Adder/ Subtractor and BCD adder

using IC 7483

11. Design and implementation of Multiplexer and De-multiplexer using logic gates

12. Design and implementation of encoder and decoder using logic gates

13. Construction and verification of 4 bit ripple counter and Mod-10 / Mod-12 Ripple

counters

14. Design and implementation of 3-bit synchronous up/down counter

15. Implementation of SISO, SIPO, PISO and PIPO shift registers using Flip- flops

TOTAL: 45 PERIODS

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ANALOG EXPERIMENT

S.No Nane of the Experiment

1 Frequency Response and Bandwidth of CE amplifier

2 Frequency Response and Bandwidth of CB amplifier

3 Frequency Response and Bandwidth of CC/CS amplifier

4 Darlington Amplifier

5 Differential Amplifiers Transfer characteristic & CMRR Measurment

6 Spice Simulation of Common Emitter and Common Source amplifiers

DIGITAL EXPERIMENT

S.No Nane of the Experiment

7 Design and implementation of code converters using logic gates

8 Design and implementation of 4 bit binary Adder/ Subtractor and BCD

adder using IC 7483

9 Design and implementation of Multiplexer and De-multiplexer using

logic gates

10 Design and implementation of encoder and decoder using logic gates

11 Construction and verification of 4 bit ripple counter and Mod-10 /

Mod-12 Ripple counters

12 Design and implementation of 3-bit synchronous up/down counter

13 Implementation of SISO, SIPO, PISO and PIPO shift registers using

Flip- flops

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CIRCUIT DIAGRAM :COMMON EMITTER AMPLIFIER

MODEL GRAPH:

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FREQUENCY RESPONSE AND BANDWIDTH OF COMMON EMITTER

AMPLIFIER

AIM: To construct a common emitter amplifier configuration using BJT and to determine

the bandwidth from its frequency response curve.

APPARATUS REQUIRED:

Sl.No Apparatus Range Quantity

1 Function generator 1

2 CRO (0-30MHz) 1

3 RPS (0-30V) 1

4 Transistor BC 547 1

5 Resistor 1K Ω, 680Ω 1,1

6 Capacitor 4.7uF 2

7 Breadboard 1

8 Connecting wires Few

PROCEDURE:

1. Connect the circuit as per the circuit diagram.

2. Set the input and apply the input signal from the FG and observe the output.

3. Vary the input frequency from 10Hz to 1MHz and the output amplitude is noted.

4. Calculate the gain and draw the frequency response curve.

5. Calculate the bandwidth.

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TABULATION:

Input Voltage Vin= ...........V

Sl.No Frequency (HZ)

Output voltage (Volt)

Gain=Vo/Vin

Gain in dB

=20log(Vo/Vi)

Calculation:

Bandwidth= f2-f1

=................Hz

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Result:

Thus the frequency response of common emitter amplifier is obtained and the

bandwidth is calculated.

Bandwidth=...............Hz

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CIRCUIT DIAGRAM : COMMON COLLECTOR AMPLIFIER

MODEL GRAPH:

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FREQUENCY RESPONSE AND BANDWIDTH OF COMMON COLLECTOR

AMPLIFIER

AIM: To construct a common collector amplifier configuration using BJT and to determine

the bandwidth from its frequency response curve.

APPARATUS REQUIRED:

Sl.No Apparatus Range Quantity

1 Function generator 1

2 CRO (0-30MHz) 1

3 RPS (0-30V) 1

4 Transistor BC 547 1

5 Resistor 33K Ω, 22K Ω, 10KΩ,

1K Ω

Each one

6 Capacitor 4.7uF 2

7 Breadboard 1

8 Connecting wires Few

PROCEDURE:

1. Connect the circuit as per the circuit diagram.

2. Set the input and apply the input signal from the FG and observe the output.

3. Vary the input frequency from 10Hz to 1MHz and the output amplitude is noted.

4. Calculate the gain and draw the frequency response curve.

5. Calculate the bandwidth.

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TABULATION:

Input Voltage Vin= ...........V

Sl.No Frequency (HZ)

Output voltage (Volt)

Gain=Vo/Vin

Gain in dB

=20log(Vo/Vi)

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Result:

Thus the frequency response of common collector amplifier is obtained.

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CIRCUIT DIAGRAM : COMMON BASE AMPLIFIER

MODEL GRAPH:

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FREQUENCY RESPONSE AND BANDWIDTH OF COMMON BASE AMPLIFIER

AIM: To construct a common base amplifier configuration using BJT and to determine the

bandwidth from its frequency response curve.

APPARATUS REQUIRED:

Sl.No Apparatus Range Quantity

1 Function generator 1

2 CRO (0-30MHz) 1

3 RPS (0-30V) 2

4 Transistor BC 547 1

5 Resistor 20K Ω, 10K Ω, 1,2

6 Capacitor 10uF 2

7 Breadboard 1

8 Connecting wires Few

PROCEDURE:

1. Connect the circuit as per the circuit diagram.

2. Set the input and apply the input signal from the FG and observe the output.

3. Vary the input frequency from 10Hz to 1MHz and the output amplitude is noted.

4. Calculate the gain and draw the frequency response curve.

5. Calculate the bandwidth.

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TABULATION:

Input Voltage Vin= ...........V

Sl.No Frequency (HZ)

Output voltage (Volt)

Gain=Vo/Vin

Gain in dB

=20log(Vo/Vi)

Calculation:

Bandwidth= f2-f1

=................Hz

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Result:

Thus the frequency response of common base amplifier is obtained and the bandwidth

is calculated.

Bandwidth=...............Hz

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CIRCUIT DIAGRAM : COMMON SOURCE AMPLIFIER

MODEL GRAPH:

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FREQUENCY RESPONSE AND BANDWIDTH OF COMMON SOURCE

AMPLIFIER

AIM: To construct a common source amplifier configuration using FET and to determine

the bandwidth from its frequency response curve.

APPARATUS REQUIRED:

Sl.No Apparatus Range Quantity

1 Function generator 1

2 CRO (0-30MHz) 1

3 RPS (0-30V) 2

4 Transistor BFW10 1

5 Resistor 2.2KΩ,10KΩ,1KΩ,1MΩ Each one

6 Capacitor 4.7uF 2

7 Breadboard 1

8 Connecting wires Few

PROCEDURE:

1. Connect the circuit as per the circuit diagram.

2. Set the input and apply the input signal from the FG and observe the output.

3. Vary the input frequency from 10Hz to 1MHz and the output amplitude is noted.

4. Calculate the gain and draw the frequency response curve.

5. Calculate the bandwidth.

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TABULATION:

Input Voltage Vin= ...........V

Sl.No Frequency (HZ)

Output voltage (Volt)

Gain=Vo/Vin

Gain in dB

=20log(Vo/Vi)

Calculation:

Bandwidth= f2-f1

=................Hz

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Result:

Thus the frequency response of common source amplifier is obtained and the

bandwidth is calculated.

Bandwidth=...............Hz

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CIRCUIT DIAGRAM : DARLINGTON AMPLIFIER

MODEL GRAPH:

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FREQUENCY RESPONSE AND BANDWIDTH OF DARLINGTON AMPLIFIER

AIM: To construct a darlington amplifier using BJT and to determine the bandwidth from

its frequency response curve.

APPARATUS REQUIRED:

Sl.No Apparatus Range Quantity

1 Function generator 1

2 CRO (0-30MHz) 1

3 RPS (0-30V) 1

4 Transistor BC 547 2

5 Resistor 10K Ω, 680Ω, 15K Ω 2,1,1

6 Capacitor 4.7uF 2

7 Breadboard 1

8 Connecting wires Few

PROCEDURE:

1. Connect the circuit as per the circuit diagram.

2. Set the input and apply the input signal from the FG and observe the output.

3. Vary the input frequency from 10Hz to 1MHz and the output amplitude is noted.

4. Calculate the gain and draw the frequency response curve.

5. Calculate the bandwidth.

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TABULATION:

Input Voltage Vin= ...........V

Sl.No Frequency (HZ)

Output voltage (Volt)

Gain=Vo/Vin

Gain in dB

=20log(Vo/Vi)

Calculation:

Bandwidth= f2-f1

=................Hz

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Result:

Thus the frequency response of darlignton amplifier is obtained and the bandwidth is

calculated.

Bandwidth=...............Hz

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CIRCUIT DIAGRAM : DIFFERENTIAL AMPLIFIER-COMMON MODE

TABULATION: DIFFERENTIAL AMPLIFIER-COMMON MODE

V1(V) V2(V) Vo(V) Ac=2Vo/(V1+V2)

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DIFFERENTIAL AMPLIFIER –TRANSFER CHARACTERISTICS AND CMRR

AIM: To construct a differential amplifier using BJT and to determine its CMRR from its

common mode and difference mode operation.

APPARATUS REQUIRED:

Sl.No Apparatus Range Quantity

1 Function generator 2

2 CRO (0-30MHz) 1

3 RPS (0-30V) 1

4 Transistor BC 547 2

5 Resistor 4.7K Ω, 10kΩ 2,1

6 Breadboard 1

7 Connecting wires Few

PROCEDURE:

1. Connect the circuit as per the circuit diagram.

2. Set the input and apply the input signal from the FG and observe the output.

3. Vary the input voltage and the output amplitude is noted.

4. Calculate the common mode and difference mode gain

5. Calculate the CMRR.

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CIRCUIT DIAGRAM : DIFFERENTIAL AMPLIFIER - DIFFERENCE MODE

TABULATION: DIFFERENTIAL AMPLIFIER-DIFFERENCE MODE

V1(V) V2(V) Vo(V) Ad=Vo/(V1-V2)

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Result:

Thus the differential amplifier is constructed using BJT and the common mode and

difference mode operation is obtained. CMRR is calculated.

CMRR=...............

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SIMULATION OF CE AND CS AMPLIFIER USING SPICE SIMULATION SOFTWARE

AIM:

To draw the circuit diagram of CE and CS amplifier and to simulate it using PSPICE

software.

APPARATUS REQUIRED:

Sl.No Apparatus Range Quantity

1 Function generator 1

2 CRO (0-30MHz) 1

3 RPS (0-30V) 1

4 Transistor BC 547 1

5 Resistor 1K Ω, 680Ω 1,1

6 Capacitor 4.7uF 2

7 Transistor BFW10 1

8 Resistor 2.2KΩ,10KΩ,1KΩ,1MΩ Each one

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