- #1
icesalmon
- 270
- 13
- Homework Statement
- Find the Average Power absorbed by the 20k Resistor
- Relevant Equations
- V = I*R
A = Vout/Vin
I wrote the following equations using node voltage, my issue is that I'm confused about why the RC branch at the output doesn't effect the value of the Gain for the amplifier; the equation involving VA / ( 20k - j12k ) is omitted in the solution.
IAC = IAB + IBC
V- = V+ = VB = VS
( VA-VC )/(20k -j12k) = ( VA - Vs )/(10k + j6k) + (Vs-Vc)/(2k+j4k)
Vc = Vground = 0V
(VA)/(20k-j12k) = (VA-Vs)/(10k + j6k) + (Vs-Vc)/(2k+j4k)