ContinuousTime DeltaSigma Design
June 1822, 2018
EPFL Premises, Lausanne, Switzerland

Delta Sigma Converter Basics, Parts A & B
Shanthi Pavan, Indian Institute of Technology
Review of quantization noise, oversampling and noise shaping. Signal dependent stability, fundamental tradeoffs in DS modulators – maximum stable amplitude and noise shaping. Simulation techniques for DeltaSigma Modulators.

Delta Sigma Converter Basics, Parts C, D & E
Shanthi Pavan, Indian Institute of Technology
Abstract to come.

HighLevel Design of ContinuousTime DeltaSigma Modulators
Shanthi Pavan, Indian Institute of Technology
Systematic design of ContinuousTime DeltaSigma Modulators from the DT prototype using ztransform and state space methods. The “method of moments" approach to design and intuitive understanding of ContinuousTime DeltaSigma Modulators.

Nonidealities in ContinuousTime DeltaSigma Modulators
Shanthi Pavan, Indian Institute of Technology
Excess loop delay, and compensation techniques. Clock jitter and metastability. Clock jitter and metastability (contd). Mitigating effects of jitter in CTDSMs. Time constant variations. Loop filter nonlinearity.

DiscreteTime DeltaSigma Design
David Johns, University of Toronto
This talk will discuss the design of switchedcapacitor delta sigma design. The basics of switchedcapacitor circuits will be presented as well as circuit approaches to overcome limitations. In addition, the design of delta sigma converters using switched capacitor circuits will be discussed with the use of an example design.

Introduction to the DeltaSigma Toolbox
David Johns, University of Toronto
This talk will give an introduction to the use of a Matlab toolbox called the ³Delta Sigma Toolbox². Extensive examples will be given as well as how to make use of statespace to use different filter topologies as well as dynamic range scaling.

Bandpass DeltaSigma ADCs
David Johns, University of Toronto
This talk will discuss the design of Bandpass Delta Sigma ADCs which are useful in RF systems. Topics covered include resonator structures, architecture choices and example systems.

Incremental and Sensor ADCs
David Johns, University of Toronto
This talk will discuss the design of incremental ADCs as well as lowfrequency sensor data converters. These goal of these converters are to not only have high linearity and SNR but also to have low offset and high accuracy.

Circuit Noise Issues with ADCs
David Johns, University of Toronto
This talk will discuss noise in basic circuits and opamps as well as a simple switchedC integrator as they apply to data converters. Topics covered include device noise basics, amplifier/cascode/mirror/diffpair noise, switchedC noise, and oversampling.

Design of Building Blocks for ContinuousTime DeltaSigma Modulators
Shanthi Pavan, Indian Institute of Technology
Abstract to come.

Systematic Design Centering a Practical ContinuousTime DeltaSigma Modulator
Shanthi Pavan, Indian Institute of Technology
Abstract to come.

Circuit Techniques to Mitigate Flicker Noise in ContinuousTime DeltaSigma Modulators
Shanthi Pavan, Indian Institute of Technology
Abstract to come.

Dynamic Element Matching (Part 1)
Ian Galton, UC San Diego
Randomization and element rotation techniques. Tree structured mismatch shaping.

Dynamic Element Matching (Part 2)
Ian Galton, UC San Diego
This lecture will explain dynamic element matching (DEM) techniques in general and mismatchnoise shaping DEM in particular. Topics include qualitative and quantitative explanations of how error from component mismatches is spectrally shaped without knowledge of the mismatches, DEM DAC topologies and their limitations, DEM encoder algorithms and implementations, and the fundamental performance tradeoffs that govern all types of DEM.

VCOBased DeltaSigma ADCs
Ian Galton, UC San Diego
ADCs based on ring oscillator voltage controlled oscillators (VCOs) enabled by digital calibration have the functionality of conventional continuoustime deltasigma ADCs, but without the need for analog integrators, feedback DACs, comparators, reference voltages, or lowjitter clocks. Therefore, they use much less area than comparable conventional deltasigma ADCs, are wellsuited to advanced CMOS technology, and can easily support reconfigurability. This lecture will describe the principles of VCObased ADCs, their limitations, techniques such as digital calibration for addressing their limitations, and will present case studies of example IC implementations.

