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ASK Modulation PDF

The document describes an experiment to construct and study an amplitude shift keying (ASK) modulation circuit. The circuit uses a 741 operational amplifier, BC107 transistor, and various resistors to modulate a 1 kHz message signal onto a 5-10 kHz carrier signal. The output is observed on an oscilloscope and measurements are recorded in a table. The goal is to analyze the waveforms and understand how ASK modulation works.

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998 views4 pages

ASK Modulation PDF

The document describes an experiment to construct and study an amplitude shift keying (ASK) modulation circuit. The circuit uses a 741 operational amplifier, BC107 transistor, and various resistors to modulate a 1 kHz message signal onto a 5-10 kHz carrier signal. The output is observed on an oscilloscope and measurements are recorded in a table. The goal is to analyze the waveforms and understand how ASK modulation works.

Uploaded by

jugal suggala
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Exp No: 1 Date:

IMPLEMENTATION OF AMPLITUDE SHIFT KEYING

Aim:

To construct and study Amplitude Shift Keying Modulation circuit and to


analyze the waveforms

Components Required:

IC 741 1
Transistor BC 107 1
1KΩ - 3
Resistors
10KΩ - 1
DC Power Supply 1
Digital Storage Oscilloscope (DSO) 1
Bread Board & Connecting Wires Set 1
Function / Waveform Generator 1

Circuit Diagram:
5V, Vcc
10KΩ

1KΩ
+15V
1KΩ
1KΩ - 7
2 6
BC 107 +
3 Output
4
1 -15V
KHz1Vol
t
Message I/P Carrier I/P 5 to 10 KHz

1 Volt
Pin Configuration for Transistor BC 107 & IC 714:

Procedure:

1. Connect the circuit as shown in the circuit diagram.


2. Adjust the input message amplitude and frequency to 1V& 1 KHz
respectively.
3. Observe the output in DSO at pin 6 of the Op-amp.
4. Tabulate the readings and write the observations.

Model graph:
Theory:
PreLab Questions:

1. What is op-amp?
2. What is on-off keying?

Tabular Column:
Frequency (Hz) or
Signals Amplitude (volts)
Time Period (s)

Modulating Input signal

Carrier Signal

Modulated ASK output


signal

Inference:

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