Electrical Engineering › Section K · Methods of analysis and theorems (ac) › Topic K.3
Superposition (ac)
A linear network with several sources responds to all of them at once exactly as the sum of its responses to each one alone. In ac work that idea does double duty: it splits a problem with several sources, and it is the only correct way to handle sources at different frequencies, including a dc bias with an ac signal on top.
In this topic
- One source at a time
- Removing the other sources
- Worked example: two sources, one frequency
- Dependent sources stay in
- Worked example: with a dependent source
- Sources at different frequencies
- Worked example: dc bias plus an ac signal
- Power does not superpose
- Common mistakes to avoid
- Key takeaways
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