Non-ideal voltage and current source

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SUMMARY

The discussion clarifies the distinctions between non-ideal voltage sources and non-ideal current sources, emphasizing their output impedance characteristics. Non-ideal voltage sources possess non-zero output impedance, resulting in voltage variations with changing load impedance, while non-ideal current sources have finite output impedance, leading to current variations when output voltage changes. The choice between these sources is application-dependent, with non-ideal voltage sources being suitable for constant voltage applications and non-ideal current sources for constant current scenarios.

PREREQUISITES
  • Understanding of electrical circuit fundamentals
  • Knowledge of output impedance concepts
  • Familiarity with voltage and current source characteristics
  • Basic principles of load impedance effects
NEXT STEPS
  • Research the applications of non-ideal voltage sources in electronic circuits
  • Study the characteristics of non-ideal current sources and their use cases
  • Explore the impact of load impedance on circuit performance
  • Learn about ideal vs. non-ideal sources in power supply design
USEFUL FOR

Electrical engineers, circuit designers, and students studying electronics who need to understand the practical implications of using non-ideal voltage and current sources in various applications.

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1. What is the difference between non-ideal voltage and non-ideal current source ( not in terms of circuit diagram like ideal voltage source plus series resistance )?

2. And how to decide that which source is used where and when ? ( because output of both is not constant)
 
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Ideal voltage source has 0Ω output impedance so it can maintain the output voltage regardless of load. Ideal current source has infinite output impedance so it can drive the same current regardless of load and regardless of the output voltage.

So non ideal voltage source has non zero output impedance so the output voltage change with different load impedance. Non ideal current source has finite output impedance so the output current change when the output voltage is forced to change.

Which one to use depends on the application. One is a constant voltage, one is constant current regardless of load impedance!
 

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