Howtosignalprocessing
- How do delta-sigma ADCs work part 3?
- What is the principal of delta-sigma modulation?
- What is Sigma Delta Type ADC?
- How does Sigma Delta work?
How do delta-sigma ADCs work part 3?
Following the modulator in the delta-sigma ADC is a digital/decimator circuit. This circuit samples and filters the modulator stream of 1-bit codes. At the modulator output, high-frequency noise and high-speed sample rates are problems.
What is the principal of delta-sigma modulation?
The goal of delta-sigma modulation is to achieve higher transmission efficiency by transmitting only the changes (delta) in value between consecutive samples, rather than the actual samples themselves. ADCs and digital-to-analog converters (DACs) both can use delta-sigma modulation.
What is Sigma Delta Type ADC?
The design of delta-sigma (∆Σ) analog-to- digital converters (ADCs) is approximately three-quarters digital and one-quarter analog. ∆Σ ADCs are now ideal for converting analog signals over a wide range of frequencies, from DC to several megahertz.
How does Sigma Delta work?
This is the delta-sigma concept in action: the first comparator senses a difference (Δ) between the integrator output and zero volts. The integrator sums (Σ) the comparator's output with the analog input signal. Functionally, this results in a serial stream of bits output by the flip-flop.
