How does an RC phase shifter work?

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SUMMARY

The discussion focuses on the operation of an RC phase shifter, specifically how it achieves phase shifts from 0 to -180 degrees by varying the resistance (R). Participants reference the "Art of Electronics" (1st edition) for theoretical backing, particularly page 78, which discusses the relationship between voltage and current in capacitors and resistors. The phase shift occurs due to the differential equations governing the behavior of these components in RLC circuits, highlighting the fundamental principles of circuit theory.

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  • Understanding of RC circuits and their components
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  • Knowledge of phase shift concepts in AC signals
  • Access to "The Art of Electronics" for reference
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  • Study the differential equations governing voltage and current in RC circuits
  • Explore the concept of phase shifts in RLC circuits
  • Review the specific section on phase shifters in "The Art of Electronics" (1st edition)
  • Experiment with circuit simulation tools to visualize phase shifts in RC circuits
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Electronics students, circuit designers, and engineers interested in understanding phase shifting techniques in analog circuits.

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That link just seems to get me to the cover page of H&H's book the AoE. Did you mean to link into a page? I only have the 1st edition of AoE -- can you describe the circuit in more detail?

You get phase shifts with inductors and capacitors because of the differential equations that relate their voltage and current behavior. Quiz Question -- Can you write out those two equations for us, and tell us why you think that would be the reason for the phase shifts in RLC circuits?
 
The page # in the AOE book is 78. Just search for 'phase shifter' in the 'seach this book' window.
The neat thing about the RC phase shifter is that the phase shifts from 0 to -180 as you vary the R.