And what is your question?
You want the sine frequency 13 kHz.
You should know that the DAC has a maximum sampling frequency of 1 MHz and 8-bit resolution.
It seems table-DMA-DAC is the only way to create multiple signals at this frequency.
But! You will encounter the problem of synchronization of separate DMA channels.
It has a little here: Terminating DMA
If you have an oscilloscope - you can experiment with the attached project.
But it seems some phase shifters on the opamps - the best solution.
MetalFinder.zip 36.4 K
Thank you Pavloven,
I will experiment with your file...
I have additionally 1 question - the SigmaDelta-conversion time has to be accurately equal to period of sine (about 13kHz)
1.what means this term actual conv.rate?
Where can I find appl. note about this conversion / with number of clock cycles?
My question is:
Why can I accurately synchronize of measure cycle of DeltaSigma conversion with sine-wave from Waveform DAC ?
They both should be the very same..
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It is difficult to understand the problem without seeing the project ...
inductive sensor signal can be obtained as follows:
PGA-> mixer (synchronous detector) -> RC filter -> PGA -> ADC
Phase synchronous detector has an offset to a small (adjustable) angle.
Commonly used phase shifter at the Shelter.
Yes, the ADC conversion, it is desirable to synchronize with a base frequency (Hardware SOC).
conversion rate - the maximum.