Recent content by timnswede

Homework Statement Homework Equations γ=α+(1/2L)ln(1/Γ1Γ2) where gamma is gain, alpha is absorption constant, and Γ are reflection coefficients. The Attempt at a Solution I'm a little stuck on how to start. If there was no semiconductor gain medium in the cavity then I could just use the...

Yes I tried to put a picture, but it wouldn't show up. The 8 bit adder has a carry in and carry out as the 9th bit

Ok the logic for why the max is 10 makes total sense to me, but I'm not sure how I would implement that. Since I could either get 2x^2 or 4x^2 from the output. But I don't think I could get the 10x^2 required from the adder could I?

Homework Statement http://imgur.com/a/3Cn7c [/B]Z is an unsigned 9 bit number and X is an unsigned 3 bit number. The only available components are an 8 bit adder and a 4-bit x 4-bit multiplier. c.) We have a single 8 bit adder and a single 4-bit x 4-bit multiplier. We would like to implement...

Homework Statement A 25-Ω antenna is connected to a 75-Ω lossless transmission line. Reflections back toward the generator can be eliminated by placing a shunt reactance Z at a distance l from the load (Fig. 1). Determine the values of Z and l. Homework Equations...

Oh wow, not sure why I didn't realize it until you guys said it, but now it makes sense, thanks!

Homework Statement This is just one of the example problems in my book which is already solved for me, but I don't really understand their solution which I'll post here: They start out with assuming Vin is very negative, which makes D1 turn on and makes Vout=VD,on+Vin. THen they solve for...

I was wondering about what you said about using two nodal equations and having a node between the capacitor and resistor, would my nodal equation for the node between the two resistor and capacitor be right, (v-4)/2 + v/2 + c(dv/dt)=0, as that simplifies to dv/dt + 6v = 12, which when solved...

OK thanks! One last question, how would I change my node equation as if I solve it I get a time constant of 1/6, but it should be 1/2? Would i use the impedance of the capacitor?

OK I got Rth and Voc. I calculated Rth to be 3 ohms and Voc (or Vth) to be 2 V. My picture looks the same as yours except I did not add the 8 volts in, and I still used nodal analysis at the node between the capacitor and the Rth. So my nodal equation was (v-2)/3 + C(dv/dt). I solved this first...

For t>0 the switch is opened and stays open forever. The switch is closed at t<=0 and assumed to be closed for a long enough time that the circuit is in dc steady state. Since the question wants i(t) i would want to find capacitor voltage as a function of time.

I added it. I wanted to find the voltage in the capacitor so i could the find the voltage in the branch parallel to i(t) and then divide by the resistance to get my answer,

Homework Statement I am trying to find the capacitor voltage in the following picture: Find i(t) in the figure below. Assume dc steady state conditions are valid for t<=0. Homework Equations i=c(dv/dt) KCL The Attempt at a Solution At t<0 I found Vc to be 8 volts which should be correct...

So without knowing luminosity (which is just power?) then the area can't be found?

Homework Statement This isn't a specific problem, but my professor told us that we can calculate the size of a star if we know the temperature of it. Homework Equations Stefan-Boltzmann Law, Wien's displacement law. The Attempt at a Solution With the temperature i can also get the intensity...