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BIOLEK, D. BIOLKOVÁ, V. KOLKA, Z.
Original Title
AC analysis of switched capacitor filters in SPICE-family programs
Type
conference paper
Language
English
Original Abstract
The paper describes a method for the analysis of the frequency characteristics of switched-capacitor circuits in SPICE-family programs, which do not provide a direct AC analysis of such networks. The method starts from the z-domain charge equations of switched circuit, which are modified to current equations. Based on these equations, macromodels of capacitor and operational amplifier are constructed and implemented as SPICE subcircuits. The method generates correct results for two-phase switched circuits containing ideal switches and ideal transforming cells such as operational amplifiers. For a convenient drawing of the model via schematic editor, special schematic symbols of the components are designed such that the user can define how the nodes are interconnected by switches during each switching phase, and also select the input and output samples for a definition of the corresponding frequency characteristics.
Keywords
Switched capacitor; SC; AC analysis; frequency characteristic; SPICE
Authors
BIOLEK, D.; BIOLKOVÁ, V.; KOLKA, Z.
RIV year
2015
Released
14. 10. 2015
Publisher
AOS L. Mikuláš
Location
L. Mikuláš, Slovensko
ISBN
978-80-8040-508-3
Book
Proceedings of the KIT 2015
Pages from
1
Pages to
6
Pages count
BibTex
@inproceedings{BUT118257, author="Dalibor {Biolek} and Viera {Biolková} and Zdeněk {Kolka}", title="AC analysis of switched capacitor filters in SPICE-family programs", booktitle="Proceedings of the KIT 2015", year="2015", pages="1--6", publisher="AOS L. Mikuláš", address="L. Mikuláš, Slovensko", isbn="978-80-8040-508-3" }