What is another name for PWM in communication engineering?

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RRB JE ECE 22 Apr 2025 Shift 2 CBT 2 Official Paper
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  1. Pulse Amplitude Modulation (PAM)
  2. Pulse Code Modulation (PCM)
  3. Pulse Duration Modulation (PDM)
  4. Pulse Position Modulation (PPM)

Answer (Detailed Solution Below)

Option 3 : Pulse Duration Modulation (PDM)
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Detailed Solution

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The correct answer is: 3) Pulse Duration Modulation (PDM)

Explanation:

In communication engineering, Pulse Width Modulation (PWM) is also known as:

  • Pulse Duration Modulation (PDM)

  • Pulse Length Modulation (PLM)

Key Characteristics of PWM/PDM:

  • Definition: The width (duration) of pulses varies based on the modulating signal, while the amplitude remains constant.

  • Applications:

    • Motor speed control

    • LED dimming

    • Power delivery (DC-DC converters)

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