Recent content by neg_ion13

Hello, I just have a conceptual question about my project. I am designing a two stage MOS opamp. Upon determining my Vin common mode low, I realize that while calculating the voltage threshold including the body effect that value is only valid at VCM, min. As the input changes so does the...

Hello, I am having a bit of a problem with this classic example. I know about the symmetry but I would like to push through the math anyway. The field point is at distance Z from loop on Z axis. Using cylindrical coordinates I am at: dH = I*(rho)d(phi)*a(phi) X (z*az - rho*a(rho)) /...

A light inductor! Brilliant!

I can answer a couple of your questions. The preamp amplifies what is called a low level signal like a guitar pickup, turntable cartridge or microphone signal. These are typically very low like 3mV. The preamp amplifies the signal to line level and provides filtering, ie tone control. The power...

At the junction of my voltage divider. So I have +4.5 at the top, ground ref in middle and -4.5 at bottom. Also, I made sure my op amp output offset was zero volts with the non-inverting input connected to ground.

As I said in my first reply 2 10ks. The other side of the load is connected to ground.

Thanks for the suggestion. I would to keep the IC count low as I am running on a 9V battery. I'm not sure what current I need yet as I have not considered the next stage of the amplifier. The main problem I am having is; due to this voltage offset at the supply pins my negative half of the...

Hello, I am trying to design a foundation for an audio preamp that is powered by a single 9V battery. I am successful so far except the single power supply part. I am using the voltage divider scheme to get a +4.5V and a -4.5V reference voltages. With no load the supply voltages are close to...

Cool. Thanks a lot.

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Oops! I am overwriting my impulses. It should be: X(jw) = 2*pi*Sigma[delta(w - pi*(2k))] + pi*Sigma[delta(w - pi*(2k + 1))]

The Fourier transform for a pulse train is 2*pi*sigma*delta(w - 2*pi/T). Here T = 2. the problem is that a regular pulse train has a constant value of 1 for the impulse while this one does not. This means the above equation needs to be modified to alternate between value of 2 and a value of 1...

The pulse train is periodic so it runs from plus -inf to +inf. At t = -2 the impulse = 2 At t = -1 the impulse = 1 At t = 0 the impulse = 2 At t = 1 the impulse = 1 At t = 2 the impulse = 2 At t = 3 the impulse = 1 At t = 4 the impulse = 2 Etc... from -inf to +inf

Homework Statement Fourier transform of scaled pulse train from -inf to +inf. Starting at 0 the first impulse is scaled at 2, the second impulse at 1 is scaled as 1, third at three scaled at 2, etc...Homework Equations Does my solution look correct?The Attempt at a Solution X(jw) =...

Does anyone know how to plot slope fields with Matlab? The only things I can find require creating unit vectors and plotting them along level curves. Is their a more direct way? Also, what program do you think is better for straight forward math operation like this, Mathematica or Matlab?