Behavioral model of a continuous current integrator with time discrete feedback and sampling

Author

Gorner, Johannes ; Uhlig, J. ; Haenzsche, Stefan ; Schuffny, Rene

Author_Institution

Tech. Univ. Dresden, Dresden, Germany

fYear

2013

fDate

8-12 Sept. 2013

Firstpage

1

Lastpage

4

Abstract

This paper proposes an analytical model for current integrator with a continuous current input signal, a continuous voltage output signal, with time discrete feedback and sampling. Such an integrator is suited as first integrator within a delta sigma (ΔΣ) modulator performing analog to digital conversion of a current input signal. Capacitive or current feedback can be used for keeping the integrator within the range of operation. The model considers slew-rate and bandwidth limited settling, parasitic capacitances, and non-linear effects. Simulink is used to explore the circuit design space for the first integrator of a 4th order hybrid incremental (I-ΔΣ) modulator.

Keywords

circuit feedback; delta-sigma modulation; integrating circuits; 4th order hybrid incremental modulator; analog to digital conversion; analytical model; bandwidth limited settling; behavioral model; capacitive feedback; circuit design space; continuous current input signal; continuous current integrator; continuous voltage output signal; current feedback; delta sigma modulator; nonlinear effects; parasitic capacitances; slew-rate; time discrete feedback; Capacitance; Integrated circuit modeling; Linearity; Mathematical model; Modulation; Software packages; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuit Theory and Design (ECCTD), 2013 European Conference on

Conference_Location

Dresden

Type

conf

DOI

10.1109/ECCTD.2013.6662252

Filename

6662252