Why use a 1-bit ADC in a Sigma Delta Modulator?

1. Why use a delta-sigma ADC?
2. How does a Sigma Delta ADC work?
3. What is the main disadvantage of Sigma Delta architecture?
4. What is Sigma Delta Σ δ ADC?

Why use a delta-sigma ADC?

∆Σ ADCs are now ideal for converting analog signals over a wide range of frequencies, from DC to several megahertz. Basically, these converters consist of an oversampling modulator followed by a digital/ decimation filter that together produce a high-resolution data-stream output.

How does a 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.

What is the main disadvantage of Sigma Delta architecture?

One of the promising topology for these purposes is Sigma-delta converters. They usually have high accuracy and high resolution (O'dowd et al., 2005). However, due to the oversampling technique, the main drawback of this converters is its long measurement time.

What is Sigma Delta Σ δ ADC?

Delta-sigma (ΔΣ; or sigma-delta, ΣΔ) modulation is a method for encoding analog signals into digital signals as found in an analog-to-digital converter (ADC).