i could only draw the ac circuit for the shunt-shunt amplifier with the feedback
i already know the formulas for the shunt-shunt:
A = V_o / I_i
B = I_f / V_o
A_f = A / (1+BA)
R_if = R_i / (1+BA)
R_of = R_o / (1+BA)
But i don't know how to find V_o, I_i, I_f?
I have attached two different amplifiers with feedback, one of them is series-series amplifier and the second one is a shunt-shunt amplifier.
AC-Analysis:
Using the Hybrid-Pie transistor model
• Determine the amplifier parameters Rin, Ro , Mid-band gain A
• Determine the low cut-off...
you can either use kcl or superposition, KCL is easier to use.
label the node A
let the current from the left battery be I1 flow to node A, the current from the right battery I2 flow to node A and current going to the middle resistor I3
KCL At node A: I3 = I1+I2
replace currents with ohms law...
Hi
In the waveform picture i attached, I don't know why the square wave is floating instead of being on the 0 of the x axis. I also attached schematic of the pwm circuit.
By the way, this is a pulse width modulator circuit made of 4 op amps, U2D is a schmitt trigger to generate sqaure...
The answer i got for V_ao = 14.285 V, V_bo = 11.428 V, I_1 = 0.285 A
and I'm not sure if the answers are right, can someone please confirm.
Thanks in advance.