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Question in Common Collector Amplifier

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Shayan22h

Joined Oct 24, 2012
30
hi guys i have a question in Common Collector Amplifier we have the Vin which is the AC voltage and we have the Vcc which is the DC voltage my question is in the junction specified below in the image, we have the AC voltage source and DC source in parallel, is it this ok ?
in the simulation i get the sum of this parrelel voltage equal to Vcc-Vac which is like series connection of Ac and DC :)
 

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MrChips

MrChips

Joined Oct 2, 2009
35,296
No. First, ignore the presence of the AC input.
Do the DC analysis to establish the Q-point of the circuit, i.e. the DC operating point.
Draw on a graph paper the I-V relationship for various base voltages.
Draw on the same graph the load line and show the Q-point.
Now you can do the AC analysis with the aid of the graph you have drawn.
 
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