BiCMOS Diff-Amp

The BiCMOS circuit in Figure P11.57 is equivalent to a pnp bipolar transistor with an infinite input impedance. The bias current is Iq=900uA. The transistor parameters are :Kp=1ma/V^2, Vtp=-1V, and lambda=0 for M1; and Beta=100, Vbe(on)=.7, and Va=infinity for Q2. [a] Sketch the small-signal equivalent circuit (mine didn't work out, two dependant currents pointed to each other..), [b] Determine the small-signal parameters for each transistor, and [c] Determine the small-signal voltage gain AV=Vo/Vi. My currents don't work out, so my ss values are too suspect. Please work this out and tell me how you did it. Thank you. The practice problem didn't specify which small signal values... click for more

Derive the output equation for the instrumentation amplifier

How do I derive the output eqation for resistance? Is the Vx/Ix, if so, please walk me through the kvl or kcl so that I can see how to determine the output resistance. Thank you greatly.

Fourier Coefficient

Please work through attached problem and let me know how you did it. Thank you.

Fourier Xform help

Using tables and properties, calculate the Fourier transform for x(t)=(t^2)*(e^(-t/5))*(cos(3*pi*t)) I'm pulling my hair out with this problem. Please tell me which properties you used to calculate the Fourier transform for this equation. Tanks.

filter design

Considering x[n]=1+sin((3*pi*n)/8 + pi/4) + cos ((9*pi*n/24) + pi/4) , please design a filter that will pass the sine-wave portion, but ignore everything else. What is the filter's input response h(t)? In a real filter, what would you have to to differently? Thanks.