Recent content by jafferrox

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...

I don't understand why Q1 is on and Q2 is off. Can someone explain me the reason for that? Thanks in advance.

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...

thanks for the help guys.

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...

I couldn't do it, can someone please do it and attach a picture or a screenshot of the working out. Thanks

I don't know what you mean, can you please make it clearer? Thanks

doesn't this mean XL=XC, i already found XL and XC is the same and then solve for c?

and then what's the next step?

Homework Statement Homework Equations XL = wL XC = 1/wC The Attempt at a Solution XL = 4pi Thanks in advance.

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.

The answer is right man, thanks heaps for the help :)

I don't know if the 20 ohm resistor is parallel or series, the one i highlighted in the attachment. thanks

I don't know how to find the total resistance in the circuit I've attached. Anybody please help me, Thanks in advance.