TY - JOUR
T1 - A Soft-Defined Pulse Width Modulation Approach-Part II: System Modeling
AU - Caporale, Salvatore
AU - Pareschi, Fabio
AU - Cambareri, Valerio
AU - Rovatti, Riccardo
AU - Setti, Gianluca
N1 - Generated from Scopus record by KAUST IRTS on 2023-02-15
PY - 2015/9/1
Y1 - 2015/9/1
N2 - In this work we model from a system design perspective the realization of a novel mixed-signal approach to pulse width modulation (PWM). The working principle for the approach, along with an implementation scheme comprised of a digital zero-positioning (ZP) followed by a proper digital-to-analog converter (DAC) and comparator, has been introduced in a companion paper. We here focus on analyzing the global system in order to get a model of its performances in terms of dynamic range and non-linearity. Since non-linearities and quantization noise occur between the ZP and the comparator, firstly, upstream models for them are provided; then their effect on the PWM signal is calculated by means of a downstream model of perturbations at the input of an ideal natural sampling PWM. Finally, an exhaustive formula for the resulting dynamic range is given and some configurations of practical interest are proposed.
AB - In this work we model from a system design perspective the realization of a novel mixed-signal approach to pulse width modulation (PWM). The working principle for the approach, along with an implementation scheme comprised of a digital zero-positioning (ZP) followed by a proper digital-to-analog converter (DAC) and comparator, has been introduced in a companion paper. We here focus on analyzing the global system in order to get a model of its performances in terms of dynamic range and non-linearity. Since non-linearities and quantization noise occur between the ZP and the comparator, firstly, upstream models for them are provided; then their effect on the PWM signal is calculated by means of a downstream model of perturbations at the input of an ideal natural sampling PWM. Finally, an exhaustive formula for the resulting dynamic range is given and some configurations of practical interest are proposed.
UR - http://ieeexplore.ieee.org/document/7229392/
UR - http://www.scopus.com/inward/record.url?scp=84940995368&partnerID=8YFLogxK
U2 - 10.1109/TCSI.2015.2459556
DO - 10.1109/TCSI.2015.2459556
M3 - Article
SN - 1558-0806
VL - 62
SP - 2290
EP - 2300
JO - IEEE Transactions on Circuits and Systems I: Regular Papers
JF - IEEE Transactions on Circuits and Systems I: Regular Papers
IS - 9
ER -