Recent content by hamburg21

Any range - ns,us, ms

Digital is the way to go, I agree. But not clocked digital, as I want a continuous input output function Hi Jim, Thanks for contributing to the conversation. I will look at your derivation some time today/this weekend. PWM is definitely something I have been looking into because it relates...

this has been helpful. I think in the end, this is very limited method of controlling pulse-widths. It cannot give an arbitrary function of widths f(input) = output.

I think I was wrong about having a variable m. I thought that by adjusting the threshold, it would change the multiplicative factor. Instead, I now believe that the multiplicative factor of the formula m*((input width) - dw) is always 2. dw is what gets adjusted,

I am not, the m is fixed at 2. This technique seems it will always double the time that the integrator is about the threshold while the input is in a high state.

we are just labeling m differently. in my equation, m is what multiplies the input width. output width = m*((input width) - dw) m*(6 ms - dw) = 2; m*(7 ms - dw) = 4; m*(8 ms - dw) = 6; You are correct that the ratio of output/input, which some may call the gain, is not fixed. But the...

ahaaa! I understand what you are saying, and I still think I am correct - we are just calculating m differently. Based on your argument 5 ms = dw (see my picture). dw is fixed and does not change because the slope is fixed and the threshold is fixed. 2*(6 ms - dw) = 2; 2*(7 ms - dw) = 4; 2*(8...

why? isn't it just dependent on the RC?

Just found this: http://van.physics.illinois.edu/QA/listing.php?id=27163&t=magnetic-field-lines-dont-really-exist nice quote: "It sure looks like field lines, right? Actually, this clumpiness has nothing to do with field lines; it's just a coincidence that it looks like lines (or perhaps it...

I like the analogy, but that is hand-waving the problem away.

That thing is awesome - I have never seen it before! Again, I realize what everyone is saying, I guess I am just looking for the physics behind the line "clumping". Has anyone modeled this effect? Meaning, has anyone written a numerical simulation that is seeded with these types of...

Maybe our definition of "linear" is the confusion. To me, linear is that the output y only depends on the input x, not something like x^2 or log(x). It is y LINEARLY related to x.

Can you at least tell me why the attached is wrong?

I still disagree - if the integrator is created the tent-like shape, and you choose a threshold like in the figure I attached, then the output will be linearly related to this input. Granted, like you said, there will be a range of short pulse widths < dw where the output will be nothing. BUT...

This is a device that will be discretized to the clock rate - not a continuous function f(x).