How would sigma-delta modulation work in software?

1. How does a Sigma-Delta modulator work?
2. What is the application of Sigma-Delta architecture?
3. What is the main advantage of Sigma-Delta architecture?
4. How does a delta-sigma or Sigma-Delta ADC work?

How does a Sigma-Delta modulator work?

In delta-sigma modulation, accuracy of the modulation is improved by passing the digital output through a 1-bit DAC and adding (sigma) the resulting analog signal to the input signal (the signal before delta modulation), thereby reducing the error introduced by the delta modulation.

What is the application of Sigma-Delta architecture?

The sigma-delta (Σ-Δ) ADC is the converter of choice for modern voiceband, audio, and high- resolution precision industrial measurement applications.

What is the main advantage of Sigma-Delta architecture?

Delta-sigma ADCs implement oversampling, decimation filtering, and quantization noise shaping to achieve high resolution and excellent antialiasing filtering.

How does a delta-sigma or Sigma-Delta ADC work?

The Delta-Sigma modulator pushes the noise to higher frequencies to increase the resolution of the ADC and performs the conversion of the analog input to a bit stream. The digital filtering and decimation stage are used to filter out the high-frequency noise and reduce the data rate to a usable amount.