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Amplitude shift keying, Slides of Electrical and Electronics Engineering

West Bengal University of Teachers' Training Electrical and Electronics Engineering

Amplitude shift keying Amplitude shift keying

Typology: Slides

2024/2025

Uploaded on 05/27/2026

soumitra-bhowmik 🇮🇳

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5.2

5-1 DIGITAL-TO-ANALOG CONVERSION

Digital-to-analog conversion is the process of

changing one of the characteristics of an analog

signal based on the information in digital data.

Aspects of Digital-to-Analog Conversion

Amplitude Shift Keying

Frequency Shift Keying

Phase Shift Keying

Quadrature Amplitude Modulation

Topics discussed in this section:

Discover Slides of Electrical and Electronics Engineering West Bengal University of Teachers' Training

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5 - 1 DIGITAL-TO-ANALOG CONVERSION

Digital-to-analog conversion is the process of changing one of the characteristics of an analog signal based on the information in digital data.  Aspects of Digital-to-Analog Conversion  Amplitude Shift Keying  Frequency Shift Keying  Phase Shift Keying  Quadrature Amplitude Modulation Topics discussed in this section:

Digital to Analog Conversion

 Digital data needs to be carried on an

analog signal.

 A carrier signal (frequency f

c

) performs

the function of transporting the digital

data in an analog waveform.

 The analog carrier signal is manipulated

to uniquely identify the digital data

being carried.

Figure 5.2 Types of digital-to-analog conversion

Amplitude Shift Keying (ASK)

 ASK is implemented by changing the amplitude of a carrier signal to reflect amplitude levels in the digital signal.  For example: a digital “1” could not affect the signal, whereas a digital “0” would, by making it zero.  The line encoding will determine the values of the analog waveform to reflect the digital data being carried.

Figure 5.4 Implementation of binary ASK