Answer: AC Voltage Source: Oscillation Around or Above Ground?

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SUMMARY

The discussion clarifies that an alternating voltage source, such as a function generator, typically oscillates around ground level. Most lab function generators allow users to set parameters like Amplitude, Frequency, and DC Offset. When grounded, the output signal oscillates symmetrically above and below ground. Additionally, function generators can produce logic pulses that range from zero volts to a specified positive voltage, suitable for driving logic circuits.

PREREQUISITES
  • Understanding of function generators and their settings (Amplitude, Frequency, DC Offset)
  • Knowledge of AC voltage concepts and oscillation principles
  • Familiarity with signal types, including sine, square, and logic pulses
  • Basic electronics knowledge, particularly regarding grounding and voltage levels
NEXT STEPS
  • Research the specifications and capabilities of different function generators
  • Learn about AC voltage waveforms and their characteristics
  • Explore the applications of logic pulses in electronic testing
  • Investigate the effects of DC Offset on signal behavior in function generators
USEFUL FOR

Electronics students, engineers, and technicians who work with function generators and need to understand AC voltage behavior in circuit testing and design.

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So if my input is an alternating voltage source, some sort of function generator plugged into the wall... will it oscillate around ground or will it oscillate above ground? Hope this question makes sense.
 
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thoughtgaze said:
So if my input is an alternating voltage source, some sort of function generator plugged into the wall... will it oscillate around ground or will it oscillate above ground? Hope this question makes sense.

Depends on the source. Most lab function generators let you specify Amplitude, Frequency, and DC Offset.
 
It's very likely that the signal generator will be grounded, if so then the signal will oscillate above and below the ground.
 
A signal generator will produce sine and square waves that are centered at ground and vary equally on either side of ground.

A function generator can do this too, but it can also generate logic pulses that vary from zero volts (ground) to some figure like plus 5 volts, which you can preset.
These pulses have the right voltage to drive logic circuitry for testing purposes.
 

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