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Potentiometer w/ Capacitor

*Neon23

Mar 19, 2018
4
Joined
Mar 19, 2018
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I'm currently studying about transistors and I would like some guidance on this part
where an amplifier has this kind of circuit
upload_2018-3-19_17-22-9.png




For the DC Equivalent Circuit
The potentiometer would be a fixed resistor and the capacitor would be open and would result to a circuit of
upload_2018-3-19_17-40-48.png




On an AC Equivalent Circuit
upload_2018-3-19_17-36-19.png
the capacitor would be shorted. However I can't seem to understand how would the potentiometer act on this circuit
 

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Harald Kapp

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Nov 17, 2011
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You need to replace the potentiometer by two resistors that add up to the value of the potentiometer. Using a single resistor represents only the special case with the wiper in the top position.
upload_2018-3-19_12-46-38.png
 
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