freq. mult.

[Toby Graves]

Hey folks.

i've been working on a problem of frequency multiplication of square waves.
I want to end up with a nice equal pusle width square wave.  So far, not a
complete success.   here's what I've tried:

square->triangle->full wave->comparator->triangle, etc.

I'm obviously using an integrator for the square to tri.


The problem with this method is that the integrator isn't perfect, so at all
freq.  I don't get equal amplitude and the wave isn't symmetric with the
x-axis, also, the integrator isn't making perfect triangle shapes at all
frequencies.


What about doubling frequency with a PLL?  Good, bad, ?
I've also used a method that consists of a negative and positive pulse edge
detection circuit.  That doesn't work very well either because after a few
generations the pulses all get crowded together where the original pulse
edges were.


toby

any ideas?