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By: V. Basil Hans.
Research Professor, Department of Commerce & Management and Humanities & Social
Sciences, Srinivas University, Mangalore, Karnataka,India
Analog signals form the foundation of how humans originally captured, communicated, and processed information in electronic devices. Characterized by their continuous fluctuation in amplitude, frequency, and phase, these signals readily replicate real-world phenomena such as sound, light, and temperature. This article covers the history of analog signals from their roots in natural waveforms to their implementation in electrical circuits and communication systems. It addresses essential topics such waveform representation, signal transmission, noise interference, and amplification, demonstrating both the benefits and limits of analog technology. The growth of analogue communication systems in broadcasting, telephony, medical instruments, and industrial control applications where precise sensing and real-time operation depend on continuous signal representation is also examined in this study. It also emphasises how analogue components like filters, oscillators, modulators, and amplifiers may enhance system efficiency and signal quality. The research compares the performance of analogue systems with contemporary digital methods and addresses issues with analogue systems, such as signal distortion, attenuation, and electromagnetic interference susceptibility. Despite the rapid expansion of digital systems, analog signals remain crucial in many modern applications, serving as the interface between the physical world and digital processing. By studying their historical history and continued importance, this article provides a complete understanding of why analog signals continue to play an important role in research and engineering.
Keywords- Analog Signals, Continuous Waveforms, Signal Transmission, Amplitude,
Frequency, Phase, Noise and Interferences, Signal Processing
Citation:
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