shalem
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Posts: 1
Bengaluru
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Hi all,
I am very new to the DAC circuit.I did some research and started to implement the Multi bit Sigma-Delta DAC.
I am putting in my understanding and implementation.I wish to have the feedback to improve my understanding.
Sigma-Delta DAC includes: 1)Interpolation and digital filter Zero stuffing between the sampled input data. I used 4 point average digital filtering.I read about FIR filters but not sure of the coefficient values. 2)Sigma-delta modulator I used first order modulator which has an accumulator(adds negative feedback to the INPUT ) and a quantizer(which takes the accumulator output and generates a lower-bit word). attached the code snippet of modulator. 3)multi bit DAC Converts the lower bit word received from modulator to the voltage.
Please provide your comments.
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