Recent content by whatphysics

simulation doesn't seem to be progressing. always stuck at this stage, see progress bar. any ideas how to solve? thanks! (btw I am trying to simulate it to get results of inductance for the copper coil)

What is the difference between amplitude spectrum and frequency spectrum? In signals and systems.

Homework Statement Finding closed loop gain and Ip and In current in op amp Homework Equations - The Attempt at a Solution I started by trying getting voltage divider for points between R1 and R2 as (R2/(R2+R1))Vs and between R4 and R5 similarly. And I'm not sure how to continue on. Any help...

So should it be Id=Vs-Vd/(R3+R1) since R3 and R1 are in series?

Homework Statement In Figure Q22, the empirical junction diode equation is : (eqn is in the picture attached) for both diodes D1 and D2, where VT = 26 mV at room temperature, n = 1, IS = 3.5 x 10-14 A, R1 = 600 Ω, R2 = 300 Ω, R3 = 200 Ω, VS = 9 V. Calculate the Q-points ID = _____ mA and VD =...

H.Blacks formula and Feedforward factor arent in my course syllabus. How do I find the feedback factor using R3 to R6? I am aware that Vo/Vs=1/β for non inverting input

Oh my gosh, as soon as I was typing out my steps and I finally got the answer. Must have keyed in wrong values somewhere in the calculator previously. So sorry for the trouble but thank you!

Homework Statement A Si diode is operated at the room temperature (27 °C). For a forward current of 1 mA, the voltage VD is found to be 0.9 V. If the VD is 1 V, the forward current = _____ mA. Given that nVT = 26 mV The answer is 46.81 Homework Equations Shockley diode equation? The Attempt...

Hello there, this isn't necessarily a homework question. I came across this qn during revision and didn't know how to solve it. Any help would be greatyly appreciated. The answer is 0.97 1. Homework Statement For the ideal OP-Amp in negative feedback configuration shown in Figure Q30...

If only my teacher had been as clear as you, thank you for all your help! I'll try to solve other op amp circuits now. Thank you!

You make it look so simple! Thanks for all your help, I'll try the method out with other op amp circuits!

Hi there, these aren't homework questions. I came across them during revision and couldn't solve them. So any help would be appreciated. The ans for the 1st image is 2 and second image is 3. For the first image, I attempted to calculate the Req for 10k and 20k resistors connected to V1 since...

Great thanks!

Great thanks!

Not homework question, just need clarification and explanation. How did the person get from the left equation to the right side. I know he's just simplifying. But he didn't include steps and I've been trying to work out how to no avail. Any help on how this person simplified the LHS to RHS? Thanks!