Summary

Jason Sachs revisits delta-sigma modulation, presenting the fundamentals of how delta-sigma modulators shape quantization noise and exploit oversampling. The article explains modulation architectures, practical design trade-offs, and how these concepts apply to audio and communications front ends.

Key Takeaways

• Explain how delta-sigma modulation shapes quantization noise and the role of oversampling in improving in-band SNR.
• Compare single-bit, multi-bit, and MASH architectures and identify when each is appropriate.
• Design basic loop filters and evaluate stability and performance trade-offs for different modulator orders.
• Apply multirate techniques: choose and design decimation filters to recover band-limited signals with minimal distortion.
• Estimate in-band noise and SNR from modulator order and oversampling ratio to guide system-level choices.

Who Should Read This

Intermediate-to-advanced DSP engineers and system designers working on ADC/DAC front ends, audio or communications systems who need practical guidance on delta-sigma modulator selection and design.

Still RelevantAdvanced

Topics