Sounds like a new PIC-based MOTM module...? :)
-----Original Message-----
From: The Old Crow [mailto:
oldcrow@...]
Sent:Friday, 28 July, 2000 4:45 PM
To:'
motm@egroups.com'
Subject:RE: [motm] FW: [AH] Frequency doubling for VCOs
On Fri, 28 Jul 2000, Tkacs, Ken wrote:
> You can also use phase-locked loops. The number of serial flip-flops
> you put in the loop determines the number of octaves shifted.
Not to mention you can add a divider after the PLL multiplier output and
end up with a frequency that is the ratio of the multiplier and divider:
M/N. Make the 'multiplier' (loop divider) and 'divisor' (final divider)
programmable, attach a bit of microcontroller fun to acquire control
voltages to set the M and N integers, and you have something I call a
"Voltage-Controlled PLL Ratio Divider"
Want a 5th above the tone? select M=3 and N=2. And so on...
(I have one of these on a protoype PCB).
Crow
/∗∗/