Input and Output Resistance (Electronics)

by Midas_Touch
Tags: electronics, input, output, resistance
 P: n/a R_out |-------------***------------o------------------| |.........................................+........................| |.................................V_signal.......................* R_in -..V_out, perfect.............................................* -...................................................................| |...................................................................| |.........................................-.........................| |-----------------------------o------------------| =.......(ground)................................................= Say that circuit 1 is the left side of the above circuit (ignore the dots), and circuit 2 is the right side (R_in). First I have to find V_signal using kirchoff rules so I get V_signal -R_out - V_out, perfect - R_n = 0 But I am not sure what happens with R_in >> R_out, R_in << R_out or when R_in = R_out.
Emeritus
PF Gold
P: 5,532
$$V_{signal}-R_{out}-V_{out,perfect}-R_n=0$$