Voltage and current are fundamental concepts, but they are not often quantities that are constant.  Time-varying voltages and current carry information to inform, to entertain and to convey measurement data, just to give a few examples.

• Why learn about signals?
• Signals are time varying voltages (or currents) and describing those signals mathematically is critical to understanding and What background should you using signals that carry information that you want to use.
• have to study signals?
• Since signals are often coded into voltage and current waveforms, you need to have a basic idea of those quantities.
• What do you need to know about signals?
• What do you need to get out of this unit?
• When you are finished with this unit you should be able to do the following.
• Describe certain signals (especially sinusoidal signals) mathematically and be able to use signal parameters like frequency, amplitude and phase for sinusoidal signals.
• Measure signal parameters in the laboratory.
• What are you going to learn about?
• Since signals are time varying voltages, you will need to learn about how to represent signals mathematically - as functions  of time
• Various parameters of typical voltage signals.
• Specific parameters of sinusoidal signals.
• What if you need more information?
• Problems
• Problem Signal1P01 - A Signal Problem
• Problem Signal1P02 - A Signal Problem
• Problem Signal1P03 - A Signal Problem
• Problem Signal1P04 - Dr. Mallity's alarm clock visits Europe
• Problem Signal2P01 - A Signal Problem
• Problem Signal2P02 - A Signal Problem
• Problem Signal2P03 -
• Problem Signal2P04 -

• Signals - Introduction to Signals

        Here are some links to experiments you can do that will help you learn about Signals.

• Experiencing Filters