[sdiy] oscillator jitter / phase noise

[Scott Gravenhorst]

jbv <jbv.silences at club-internet.fr> wrote:
>
>
>Scott Gravenhorst a *crit :
>
>> jbv <jbv.silences at club-internet.fr> wrote:
>> >>
>> >>
>> >> This would then lead to very interesting phasing pattern,
>> >> if two or more oscillators beat against each other.
>> >> Obviously a quartz stabilised oscilator, DCO or software
>> >> oscillator will not have this feature.
>> >
>> >this feature (phase noise/jitter) is very easy to implement
>> >in a DCO or software oscillator, by simply adding the
>> >output value of a random LFO to the phase accumulator...
>> >of course, each oscillator needs its own random LFO...
>>
>> I would wonder, however, whether this would accurately (or
>> accurately enough) simulate the conditions of an analog VCO.
>>  As was pointed out, there are many factors which contribute
>> to a VCO's non perfect nature.
>>
>
>Yep...
>So why not add another random LFO to control frequency jitter,
>and (why not) another random LFO to slightly modify the shape
>of the waveform ?
>
>What other parameters could be modified ?
>

Why not just build analog VCOs?  (c:

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