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Summary:
 To find output impedance of ltspice circuit with three ac sine source.
Main Question or Discussion Point
Hi friends,
I have taken three sine AC sources and have joined them in series. I want to find the output impedance of this circuit.
Formula that I am using is...Output impedance = (Open circuit voltage  Output voltage with load R1) / Output current with load (R1)
Load resistance = 1 k ohm.
The problem arises when I am trying to find the open circuit voltage, as there is no change in output voltage (RMS = 893.42 mV):
i) When load resistance is 999999 and
ii) When load resistance is 1k.
Where I could be wrong?
Please find .asc file in the attachment.
I have taken three sine AC sources and have joined them in series. I want to find the output impedance of this circuit.
Formula that I am using is...Output impedance = (Open circuit voltage  Output voltage with load R1) / Output current with load (R1)
Load resistance = 1 k ohm.
The problem arises when I am trying to find the open circuit voltage, as there is no change in output voltage (RMS = 893.42 mV):
i) When load resistance is 999999 and
ii) When load resistance is 1k.
Where I could be wrong?
Please find .asc file in the attachment.
Attachments

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