[sdiy] PLL module

[Scott Gravenhorst]

cheater cheater <cheater00 at gmail.com> wrote:
>Are those logical value outputs (square wave)? Can you AND/XOR them
>with other values? If so, it could be fun to run a simple sequencer
>that turns the frequencies on and off - especially the higher
>frequencies could benefit from this for 'texture'.
>

The outputs come from the chain of CMOS flipflops wired as toggle and one divide by 3 circuit also
CMOS.  Any logic computation could be performed easily by adding a few gates.  All outputs (as the
circuit is shown) are 50% duty cycle, so they are true square waves.

>
>On Wed, Apr 7, 2010 at 15:28, Scott Gravenhorst <music.maker at gte.net> wrote:
>> cheater cheater <cheater00 at gmail.com> wrote:
>>>so is that basically an 'octaver'? I don't know how these work - but
>>>the effect should be similar, right? audio in, octaves (or in this
>>>case, 'harmonics') out? Or does it output CV?
>>>
>>>Cheers
>>>D.
>>>
>>>On Wed, Apr 7, 2010 at 14:40, Scott Gravenhorst <music.maker at gte.net> wrote:
>>> I designed this PLL circuit for audio to track a FatMan VCO and
>>>produce 1F, 1.5F, 2F, 3F, 4F, 6F and 12F outputs.  Lag time is
>>>adjustable and can be made quite insignificant at the low end.
>>
>> It is a frequency multiplying 4046 phase locked loop circuit that receives a VCO output
>> as it's input.  It synchronizes to the input and produces audio.  It is not a CV
>> processor.  The audio outputs are at frequencies 1F, 1.5F, 2F, 3F, 4F, 6F and 12F given
>> the VCO is at 1F.
>>
>> 2F and 4F are 1 and 2 octaves above the input. 1.5F, 3F, 6F and 12F are all perfect
>> fifths at zero or more octaves above 1.5F (relative to the input frequency of 1F).
>>
>> It was the perfect fifths for which I built it, but the octaves 
>were there by default, so > I brought them out to the panel as 
>outputs as well. > 
>>>http://home1.gte.net/res0658s/fatman/4046pll.html > > It is 
>definately a "fattener" as the OP wrote.  Playing with the lag or 
>damping control > is also lots of fun as at the long end, it 
>produces a portamento effect.  At minimum > settings, no 
>portamento is audible. > > >>Original Message ----- >>From: "Sean 
>Ellis" >><tensiontype at hotmail.com> >>To: "Sean Ellis" 
>>><tensiontype at hotmail.com>; "Julian" >><julian at port23.co.uk>; 
>>>"Harry Bissell" <harrybissell at wowway.com>; >>"Jason Proctor" 
>>><jason at redfish.net> Cc: >><synth-diy at dropmix.xs4all.nl> Sent: 
>>>Tuesday, April 06, 2010 11:15 >>PM Subject: Re: [sdiy] trolls 
>and >>unicorns >> >> >>D'oh! PLL is what I meant, it's late.... 
>>> >>>>----- Original Message ----- >>From: "Sean Ellis" 
>>><tensiontype at hotmail.com> >>To: "Julian" <julian at port23.co.uk>; 
>>>"Harry Bissell" >><harrybissell at wowway.com>; "Jason Proctor" 
>>><jason at redfish.net> >>Cc: <synth-diy at dropmix.xs4all.nl> >>Sent: 
>>>Tuesday, April 06, 2010 11:07 PM >>Subject: Re: [sdiy] trolls 
>and >>unicorns >> >>> Back to business, why are there so few PPL 
>>>modules out there? A long time >>> ago I made a crazy module 
>with >>a PPL at its heart, it was based on a >>> harmony circuit 
>that >>was supposed to perform a backup when a person >>> 
>whistled a >>tune. With some careful additions it turned into an 
>amazing >>> >>'fattener' module for synths, the tracking was 
>awful and sounded >>like your >>> drunk friend trying to see what 
>keys you were >>pressing....I always >>> wondered why people dont 
>use PPLs more. >>> > -- ScottG > 
>>>________________________________________________________________________ 
>>>> -- Scott Gravenhorst > -- FPGA MIDI Synthesizer Information: 
>>>home1.gte.net/res0658s/FPGA_synth/ > -- FatMan: 
>>>home1.gte.net/res0658s/fatman/ > -- NonFatMan: 
>>>home1.gte.net/res0658s/electronics/ > -- When the going gets 
>>>tough, the tough use the command line. > > 
>>>_______________________________________________ > Synth-diy 
>>>mailing list > Synth-diy at dropmix.xs4all.nl > 
>>>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy > 
>>>_______________________________________________ Synth-diy 
>mailing >>list Synth-diy at dropmix.xs4all.nl 
>>>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy >> > > -- 
>ScottG > 
>________________________________________________________________________ 
>> -- Scott Gravenhorst > -- FPGA MIDI Synthesizer Information: 
>home1.gte.net/res0658s/FPGA_synth/ > -- FatMan: 
>home1.gte.net/res0658s/fatman/ > -- NonFatMan: 
>home1.gte.net/res0658s/electronics/ > -- When the going gets 
>tough, the tough use the command line. > > > 
>_______________________________________________ > Synth-diy 
>mailing list > Synth-diy at dropmix.xs4all.nl > 
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy > > 
>_______________________________________________ Synth-diy mailing 
>list Synth-diy at dropmix.xs4all.nl 
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy 
>

-- ScottG
________________________________________________________________________
-- Scott Gravenhorst
-- FPGA MIDI Synthesizer Information: home1.gte.net/res0658s/FPGA_synth/
-- FatMan: home1.gte.net/res0658s/fatman/
-- NonFatMan: home1.gte.net/res0658s/electronics/
-- When the going gets tough, the tough use the command line.