A symbolic SC integrator model for fast time-response simulation

Author

Ailin Zhang ; Guoyong Shi

Author_Institution

Dept. of Micro/Nano-Electron., Shanghai Jiao Tong Univ., Shanghai, China

fYear

2015

fDate

24-27 May 2015

Firstpage

1949

Lastpage

1952

Abstract

A symbolic macromodel for slew and settling characterization of fully differential switched-capacitor (SC) integrators is proposed in this work. This model is intended for fast behavioral simulation of data converters in the time-domain. The main advantages of the proposed model are: 1) it can be created automatically without the need of running a transient simulation; 2) it is fully composed of circuit elements that can be simulated by SPICE or MATLAB; 3) it is created in symbolic form so that adjustment of the transistor-level circuit is directly reflected in the macromodel without the need of remodeling. The proposed modeling methodology is validated by applying to SC integrators implemented by two different operational amplifiers. The step response waveforms of the integrator model have good agreement to the transistor-level simulation results with a speedup of about 20x.

Keywords

integrated circuit modelling; integrating circuits; operational amplifiers; step response; switched capacitor networks; SC integrators; data converters; fast behavioral simulation; fully differential switched-capacitor integrators; operational amplifiers; settling characterization; slew; step response waveforms; symbolic macromodel; time-domain; transistor-level circuit; transistor-level simulation results; Analytical models; Capacitors; Integrated circuit modeling; Limiting; Mathematical model; Semiconductor device modeling; Switches; Macromodel; fully-differential operational amplifier (opamp); switched-capacitor (SC) integrator; time response;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2015 IEEE International Symposium on

Conference_Location

Lisbon

Type

conf

DOI

10.1109/ISCAS.2015.7169055

Filename

7169055