Frequency dividers

[Harry Bissell]

Hmmm...

If im following... you want

/1 = fundamental
/1.5 = perfect fifth down
/2 = one octave down
/3 = one octave and a fifth down

/4 = two octaves down...
/4.5  =  ???    what would that be..
/5 = I don't know what musical interval this is. I CAN show you how to get
this one
/5.5 = ??? what would that be ???

The /1.5 uses a special trick. Normally you can only divide by integers. But
with some
creative clocking (like clock on both rising AND falling edges of the input)
it can be done.
Its really a divide by three circuit at heart.

Now that 4.5... do you mean two octaves and a fifth down ?? is so just
divide the
/3 output  by 2 that would be a divide by 6 = two octaves and a fifth...

If not please tell me what musical intervals you were expecting...

BTW: once you have the basic /1 and /1.5, you can use a dual 4 bit counter
such as the CD4520 to get /2 /4 /8 /16 functions.  This would give all
possible
octave and fifth suboctaves up to four octaves down.

H^) harry



Mitchell Hudson wrote:

>     I want to modify my Blacet Frequency Divider by adding extra divider
> stages. it already has /1, /1.5, /2 and /3. I want to add /4, /4.5, /5
> and /5.5. i am loooking at the schematic and the divide by 2 I
> understand but the divide by 1.5 stage is kind of stumping me.
>     My idea was to tap the earlier divider stages to create the new
> divided ouput. Then add these into the final mix with everything else.
> If anyone has any suggestions please feel free to pass them on .
>
> Thanks
>
> --M