[sdiy] DCO Question

[Tim Ressel]

DCO? NCO? Its a processor that is programmed to make a ramp by adding a 
value to an accumulator and outputting to a DAC.

--tr



On 11/2/2017 8:39 AM, paula at synth.net wrote:
> Tim,
>
> Do you mean DCO?
> I.e. a ramp generator with the reset time controlled by a CPU?
>
> or do you mean DDS/NCO ?
>
> Paula
>
> On 2017-11-02 15:26, Tim Ressel wrote:
>> Hi,
>>
>> I am making a digital oscillator (DCO) and was wondering if there is a
>> way to reduce the jitter one gets at higher frequencies. I understand
>> it comes from round off error (for lack of a better term): as the
>> accumulator reaches the top of the range the remaining amount is less
>> than the value being added, and that fraction changes every cycle.
>> This causes jitter, or is it aliasing? Anyway, is there a clever way
>> to deal with it?
>>
>> Thanks!
>

-- 
--Tim Ressel
Circuit Abbey
timr at circuitabbey.com