Scott Gravenhorst, Synthaholic
chordman at ix.netcom.com
Sat Aug 19 17:38:06 CEST 1995
I am new here so I don't know if this subject has been visited
recently. Apologies if it was.
I was playing around with a 4046 micropower PLL (connecting it to lock
to a VCO output) and found that while it will track a VCO very nicely
without a counter in the loop, when a divide by N counter (I used div
by 3) it will lock and frequency multiply only when a rather low freq
lowpass filter is used. It tracks, but with a large amount of over and
undershoot. The settling time is enormous at something around a half
second or more. For my needs, the settling time is too long. I am
hoping to reduce this effect to not more than a short chirp.
Have any others of you done this kind of thing? I am interested in
frequency multiplication, particularly by 3. That would allow me to
generate a perfect fifth without having to dedicate a VCO to that.
Have you ever wondered why AT&T chose the 'Death Star' as their logo?
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