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Electronics => Projects, Designs, and Technical Stuff => Topic started by: Katanara on April 19, 2022, 03:09:26 pm

Title: Multichannel sine generating: DDS or DSP?
Post by: Katanara on April 19, 2022, 03:09:26 pm

Hi guys! I'm considering various ways of multichannel (3-4 sources) generation of a sine waves. The needful signal range is 50-100 kHz. At the current stage, I have an appropriate number of DDS (AD9834) with the ability to adjust the amplitude using a DAC (multichannel too). It works nice, but it doesn't seems the cheapest way. I'm interested in learning of DSP. Is it possible to replace several DDS with one low-cost DSP (like ADAU 1701)? With my specifical requirements: amplitude control from 0V (or close to that), the mentioned frequency range. And preferably low-cost :)
Thank you for your attention!

Title: Re: Multichannel sine generating: DDS or DSP?
Post by: b_force on April 22, 2022, 09:33:04 am

The DSP you have in mind will work, but it won't go higher than 20kHz (even at higher samplerates).

Besides, because of all the chip shortages, basically any DSP is out of stock :(