EE Electronics fundamentals/Lecture Basic Resistive Circuit Analysis
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KVL
[edit | edit source]Kirchhoff's voltage law
Sum of voltages between the start and end of circuits is 0.
V0 = V1 + V2
KCL
[edit | edit source]Kirchhoff's current law
Currents in point are balanced. Sum of currents is 0.
I1+I3=I2
Mesh method
[edit | edit source]based on KVL
- Choose the reference point
- Walk through this loop by labeling voltages(even if undefined)
- Construct equation
- Solve equation
*if more loops, then possible to create the system of equation
Whole resistance:
Whole current:
*if any from this resistors is undefined, we can solve this equation
In general we can use also this equation:
Signs for elements mirroring the logic of KVL.
Node method
[edit | edit source]- Choose node
- Label currents
- Construct equation
- Solve equation
Also possible to create systems of equations for complex circuits.
Conversions
[edit | edit source]https://en.wikipedia.org/wiki/Y-%CE%94_transform
References
[edit | edit source]Book about circuit analyses: https://archive.org/details/engineeringcircu0000hayt_n1c5/
More about KVL on allaboutcircuits.com