Pulse Amplitude Modulation Circuit
Here, we will discuss the Circuit diagram of Pulse Amplitude Modulation given below :
- The signal that contains the data you desire to send is generated by the modulating signal generator.
- The high-frequency waveform that the carrier signal is composed of, is produced by the carrier signal source. Typically, this signal has a frequency that is substantially higher than the modulating signal.
- The carrier signal and the modulating signal are combined in the amplitude modulation circuit. Usually, a multiplier circuit such as a transistor circuit or an integrated circuit intended for modulation is used for this. The carrier signal’s amplitude is managed by the modulating signal. The carrier signal’s amplitude is modulated in accordance with variations in the amplitude of the modulating signal.
- The PAM signal is the result of the amplitude modulation circuit. The modulating signal affects the amplitudes of the pulses in this signal.
Pulse Amplitude Modulation
Pulse Amplitude Modulation (PAM) is a key modulation technique used in digital communication for transmitting analog data and is one of the most widely used types of analog-to-digital conversion. Its process is simple where the amplitude of a sequence of pulses changes with the instantaneous amplitude of the analog message signal. The analog signal that is to be modulated is sampled by a sequence of pulses that are amplitude-modulated on the carrier to produce the amplitude-modulated pulses.
The analog signal is sampled at regular intervals to enable the amplitude of pulses due to be produced by the carrier to be varied. The sampled values are quantized to a specific number of quantization levels or discrete levels whereupon the process is repeated. Due to its simplicity of implementation and analysis, PAM is often employed in many applications including digital communication, audio transmission, and instrumentation among others. One of the biggest drawbacks of PCM is its sensitivity towards channel errors, as poor-quality channels will introduce noise and distortion, particularly over larger distances and lower data rates.
Table of Content
- What is PAM?
- PAM Block Diagram
- Types
- Mathematical expression
- Construction
- PAM Circuit
- Solved Examples on PAM
- Applications
- Advantages
- Disadvantages