Recent content by cuongbui1702

I have problem with this circuit. Normally when vP>vN (if I set vN>0.4V), output vQ is equal 5v. But when I set vN < 0.4V, output is not true, it is always 5V not only for vP< vN but also vP>vN. I need to design ADC circuit, and that is comparator block. Need some suggestions. Help me . I...

Maybe My analysis is as same as with her but I know that is still exist a independent source Vin and it change to Vth (thevenin-Norton equivalent circuit), but when she wrote her analysis on blackboard, and told she give Vin = 0, I don't know she give it away or it is still there but transform...

My circuit is AC equivalent circuit of BJT. She said that when she calculate Output impedance = Vo/io, she put Vin = 0. I don't know what she means, maybe she removed Vin give it away or it is like Thevenin-Norton circuit it replace voltage source or current source with resistance source. In...

Homework Statement My teacher gave me a method to find Impedance of Thevenin and Norton. Here is her method: she removed Indepentdence source (voltage is closed, current is open) and did not put V external ( so the dependent source did not working because of no source). And she find resistance...

Homework Statement Apply the Central limit theorem to evaluate approximately the lower bound for the probability that the difference between the relative frequency p^ and p is less than 0.01, if n = 4500 Homework Equations This exercise do not give me the confidence interval? What function...

Thank for your answers. And one more question, my teacher said me that: when I calculate Zin or Zout, I must have 1 condition such as: Iin =0, or Iout = 0. Why I must have this condition?

So almost is assuming, and Io = ic( AC of IC, IC is DC current going through RC). That makes me messing up. When I take a Rload, where is Io, does it continue going through Rc?

But why Ii is not equal 0 because of C1

My teacher gave me this picture below. My question is why Io go through Rc but does not go through C2

Homework Statement Homework Equations The Attempt at a Solution I don't know what is the difference between the change in entropy of the gas vs the thermal reservoir??

C have electric field, isn't it?

what i mean is: in C, Existing of Induced Electric Fields I have: E = (r/2).dB/dt( r is radius of circle 1)=> C doesn't have electric field But when E' = (r'/2).dB/dt(r' is radius of circle 2) => C still have electric field( C belongs to circle2) I think when B change, every where in space...

Homework Statement B is increasing with rate: dB/dt when C is center of circle 1, Induced Electric Field is 0, but when i take another circle, in C, existing Induced Electric Field Homework Equations I used this equation to prove The Attempt at a Solution Do Induced Electric...

Homework Statement Homework Equations That is the solution: The Attempt at a Solution I think ε≠Bvl because ε = - dø/dt=- Bd(v.t)/dt, v is not constant. Why ε=Bvl?

Homework Statement Homework Equations That is my solution: The Attempt at a Solution i solve my problem without ø=30°, I confused what this angle was used to do?