MOTM

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

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