What is Signal ? | Representation of Signals | Signals and Systems in EXTC Engineering

TL;DR

Signals are patterns that contain information and can be represented as graphs. They can be found in various domains such as electrical systems, biological systems, and sports matches.

Transcript

hello friends in this video we are going to see a definition of a signal and different types of signals that exist so signal is nothing but a pattern which will have some information in it let me give an example i will consider a simple rc circuit excited by a voltage source like this there will be a current eye flowing and that will develop a volt... Read More

Key Insights

• 💁 Signals are patterns that carry information and can be represented as graphs or plots.
• 🚙 They can be found in various domains, including electrical systems, biological systems, sports matches, and weather.
• 📡 Signals can be mathematically represented as functions of independent and dependent variables.
• 🏃 Examples of signals include voltage, current, capacitor voltages, heartbeat, run rate, and runs scored.
• 📈 Graphs and plots of signals provide valuable insights into the behavior and characteristics of systems.
• 📡 Signals are not limited to a specific domain but can exist in any system that exhibits patterns.
• 💁 Each signal has a specific pattern or graph that represents the information it carries.

Questions & Answers

Q: What is a signal?

A signal is a pattern that carries information and can be represented as a graph or plot against time or other parameters. It can be found in various domains such as electrical systems, biological systems, and sports matches.

Q: What are examples of signals in an electrical system?

Examples of signals in an electrical system include supply voltage, supply current, and capacitor voltages. These can be plotted against time to analyze the behavior of the system.

Q: Can signals only exist in electrical and biological systems?

No, signals can exist in any physical system. For example, in sports matches, graphs of run rate and runs scored can be considered as signals. Signals can also be found in domains like weather, with graphs of temperature against days.

Q: How are signals mathematically represented?

Signals can be mathematically represented as functions of independent variables and dependent variables. For example, a speech signal can be represented as a function of acoustic pressure, where different tones are generated based on the applied pressure.

Summary & Key Takeaways

• Signals are patterns that carry information and can be plotted against time or other parameters.

• Examples of signals include voltage, current, and capacitor voltages in electrical systems, heartbeat in biological systems, and run rate and runs scored in sports matches.

• Signals can be represented mathematically as functions of independent variables and dependent variables.