How Do You Determine the Starting Point of Phase in Circuit Analysis?

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SUMMARY

The discussion focuses on determining the starting point of phase in circuit analysis, specifically addressing the phase response of circuits with sine wave and cosine wave inputs. It emphasizes that the output phase is relative to the input phase, which is arbitrary. The key formulas mentioned include theta(jw) = 90 degrees - arctan( ) and theta(jw) = 0 degrees - arctan( ). The discussion highlights the importance of defining the zero point of the input signal for accurate phase analysis.

PREREQUISITES
  • Understanding of circuit analysis principles
  • Familiarity with sine and cosine waveforms
  • Knowledge of phase response in electrical engineering
  • Basic skills in using arctangent functions for phase calculations
NEXT STEPS
  • Research the concept of phase shift in AC circuits
  • Learn about the application of arctan in phase calculations
  • Explore the differences between sine and cosine wave inputs in circuit analysis
  • Study the implications of arbitrary phase definitions in signal processing
USEFUL FOR

Electrical engineers, students in circuit analysis courses, and professionals working with AC signal processing will benefit from this discussion.

cutesteph
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When writing the question for the phase response of a circuit, how do I know when it begins. Like for example theta(jw) = 90 degrees - arctan( ) or theta(jw) = 0 degrees - arctan( ) ?
 
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Output phase is relative to input phase, which is arbitrary. Consider a sine wave input ... or is it a 90degree phase shifted cosine input? You define 0 on the input wherever you want to.
 

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