Recent content by vermin

Hi, so I went to community college and got an AS engineering transfer degree, transferred to an expensive private university and completed 1 year there. This summer, during my internship, a family situation came up that requires me to move to Arizona. Also, I got an inheritance from my grandpa...

yeah don't really have access to a debugger. I've tried using cout messages, that's how I knew it was getting stuck on that loop.

Homework Statement The program is supposed to take in a text file that has a letter and an integer on each line separated by a space. The integer is the order the letter is supposed to come in. The assignment is to write a program that takes the letters and inserts them using pointers into...

Nevermind, I got it. V'A was in units of V/um, so really 10*(V/um) [(10*(V/um))(0.4*um)]/(100*uA)=(10*V*0.4)/(100*uA)=40,000 ohm ^ because the um cancels out in numerator, ^ becomes just 4 V

Homework Statement Supposed to find Ro for a CS MOSFET amp given V'A=10V/μm, L=0.4μm, and ID=100μA. Homework Equations Ro=ro=V'A*L/ID The Attempt at a Solution I say that ro=10μ*0.4μ/100μ= 10*10^-6*0.4*10^-6/100*10^-6 = 4*10^-8 Book says "10x0.4/.1=40kΩ" .. what exactly...

ok nevermind I just figured it out.

Homework Statement A CS amplifier utilizes a MOSFET with μnCox = 400 μA/V2, W/L = 10, and VA=10v. It is biased at ID=0.2mA and uses RD=6k. Find Rin,AVO,RO Homework Equations VAO= -gm(RD||ro) Ro=RD||r0 The Attempt at a Solution I drew out the equivalent circuit with...

Thanks for the pointers on terminology but my burning question is if I'm finding the potential there at V_o correctly. Does that seem correct, then? using I_z=(V-Vzo*2)/(R+r_z*2) for the current going into that node, and V_o being 13.52V?

Ok. So. The only thing that's making sense to me right now for that current is using I_z=(V-Vzo*2)/(R+r_z*2), because that makes I_z = 2.96mA, which in turn means V_R = 1.48V. It seems to make sense that under no load the voltage drop V_o would be around 13.52V, at least intuitively.

so Vgs must = Vs-Vd = 2.5V-1.5V = 1V. Ok I will work with that and see where it gets me.

Right that's just what I'm doing and where I'm getting stuck is this; I have replaced the two zener diodes each with voltage sources of voltage V_Zo=6.7v, and resistors r_z=20 ohms. Now, I could say the total current going into the node above, which should equal the current through R, would be...

Right sorry Vdd was given as 2.5V. So. yeah. voltage across the resistor must be 1.5V, I_D is .8mA so R_D=V_D/I_D=1.5/.0008=1875ohms That does seem obvious. But now how do I go about solving for the Width? All I have are these equations I don't understand fully, and I know that I need V_OV...

ok. I guess I could answer that if I was seeing the big picture here, but I'm not. I thought there was one I_z to find that's true for both zeners but I guess not. I'm going back over a similar problem using one zener and see how to adapt it. meanwhile, any tips on a general approach would...

Update, I think I figured out that I can use VGS-VT=VOV because VGS should = VDD = 2.5V so VOV=2.5-0.6 = 1.9V Plugging that into the above equation for ID gets me W=1.108 Also for the resistor I used RD=(VDD-VD)/ID = (2.5V-1.5V)/.08mA = 1250Ω

Homework Statement The diagram: http://images.fr1ckfr4ck.fastmail.fm/probC.jpg This MOSFET has the following parameters: |VT| = 0.6V μpCox = 100 (μa/V2) L = 0.25μm λ = 0 Establish a drain current of 0.8 mA and a voltage VD of 1.5V. Determine the transistor width W, and the...