The benefits of multibit chaotic sigma delta modulation.

A 2.8-V Multibit Complex Bandpass Delta-Sigma-AD Modulator in 0.18µm CMOS

Simplified Logic for First-Order and Second-Order Mismatch-Shaping Digital-to-Analog Converters

Mismatch-shaping digital-to-analog converters (DACs) have become widely used in high-performance delta–sigma data converters because they facilitate delta–sigma modulators with multibit quantization. Relative to single-bit quantization, multibit quantization significantly relaxes the analog circuit performance necessary to achieve a given level of data converter precision, but significant digit...

Design and Implementation on High-order Mismatch-shaped Multibit Delta-Sigma D/A Converters APPROVED BY SUPERVISING COMMITTEE:

Dual quantization continuous time ΣΔ modulators with spectrally shaped feedback

A new technique is proposed to eliminate the nonlinear error of a multibit digital-to-analog converter (DAC) used in a sigma-delta modulator where the solidity of multibit DAC against the clock jitter is reserved. By using dual quantization, this technique reduces the bit length of DAC to one bit and consequently eliminates its nonlinear error. A lowpass finite impulse response (FIR) filter wit...

High-Speed Multibit Delta-Sigma ADCs with On-Line Digital Error Correction

Multibit delta-sigma modulators are widely used in recent analog-to-digital converter (ADC) implementations [1, Chapter 8]. Due to their improved stability, they can achieve the same high signal-to-noise ratio (SNR) with lower order modulator and lower oversampling ratio (OSR), i.e. higher speed, than their singlebit counterparts. Also, the use of a multibit feedback relaxes slew-rate and settl...