Why Does Overshoot Occur in Electronics?

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SUMMARY

Overshoot in electronics occurs when a signal exceeds its intended maximum voltage, such as a square wave oscillating between 0-5V exceeding 5V. This phenomenon is primarily caused by inductance in the circuitry, which allows electrons to maintain momentum, leading to voltage spikes. Achieving perfectly square waves is impossible; however, near-square waves with rounded corners and minimal overshoot can be designed using specialized circuitry. Understanding these principles is crucial for effective signal integrity management in electronic designs.

PREREQUISITES
  • Understanding of inductance in electronic circuits
  • Familiarity with square wave signal generation
  • Knowledge of signal integrity concepts
  • Experience with circuit design techniques
NEXT STEPS
  • Research techniques to minimize overshoot in square wave signals
  • Learn about specialized circuitry for signal shaping
  • Explore the effects of inductance on signal integrity
  • Study the design principles for creating near-square waves
USEFUL FOR

Electronics engineers, circuit designers, and anyone involved in signal processing and integrity management will benefit from this discussion.

likephysics
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Why does overshoot happen. For example in electronics, a square wave oscillating between 0-5V, overshoots 5V by a small margin.
When the power supply can only supply a max of 5V, how can the signal overshoot. I guess the same goes for ground (signal going below zero).
 
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Inductance in the circuitry causes this, electrons have some momentum and it requires special circuitry to counter this. I don't think it's possible to make perfectly square waves, but near square waves with rounded corners and no overshoot are possible.
 

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