sinusoidal steady-state analysiseee.guc.edu.eg/courses/electronics/elct401 electric circuits...
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SINUSOIDAL STEADY-STATE ANALYSIS
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Objectives To perform circuit analysis using the following techniques:
1. Basic Approach (KCL and KVL – Circuit reduction)
2. Nodal Analysis
3. Mesh Analysis
4. Superposition Theorem
5. Source Transformation
6. Thevenin and Norton Equivalent Circuits
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Steps to Analyze AC Circuits:
1. Transform the circuit to the phasor (frequency) domain.
2. Solve using an appropriate circuit technique such as nodal
analysis, mesh current analysis, superposition, etc.).
3. Transform the resulting phasors back into time domain.
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Impedance Combinations
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Determine the input impedance of the circuit in figure below
at ω =10 rad/s.
Answer: Zin = 32.38 – j73.76
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Example 2
Solution
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Bridge Circuit
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Bridge Circuit analysis
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This Bridge is used to measure L and R4
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Superposition Theorem
When a circuit has sources operating at different frequencies,
• The separate phasor circuit for each frequency must be solved
independently, and
• The total response is the sum of time-domain responses of all
the individual phasor circuits.
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Superposition Theorem
Example
Calculate vo in the circuit of figure shown below using the superposition
theorem.
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Thevenin and Norton Equivalent Circuits
Thevenin transform
Norton transform
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To Find ZTh
Example
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