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Article

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Title

NANO-studio, the design environment of filter banks implemented in standard CMOS technology

Authors

[ 1 ] Wydział Techniczny, Akademia im. Jakuba z Paradyża | [ P ] employee

Scientific discipline (Law 2.0)

[2.3] Information and communication technology

Year of publication

2021

Published in

Analog Integrated Circuits and Signal Processing

Journal year: 2021 | Journal volume: 109 | Journal number: 2

Article type

scientific article

Publication language

english

Keywords
EN
  • CMOS analog circuit design  Current mode circuits  Standard digital CMOS technology  Filter banks  Frequency-interleaved ADC  Low power low sensitive circuits
Abstract

EN The paper presents a method of optimizing frequency characteristics of filter banks in terms of their implementation in digital CMOS technologies in nanoscale. Usability of such filters is demonstrated by frequency-interleaved (FI) analog-todigital converters (ADC). An analysis filter present in these converters was designed in switched-current technique. However, due to huge technological pitch of standard digital CMOS process in nanoscale, its characteristics substantially deviate from the required ones. NANO-studio environment presented in the paper allows adjustment, with transistor channel sizes as optimization parameters. The same environment is used at designing a digital synthesis filter, whereas optimization parameters are input and output conductances, gyration transconductances and capacitances of a prototype circuit. Transition between analog s and digital z domains is done by means of bilinear transformation. Assuming a lossless gyrator-capacitor (gC) multiport network as a prototype circuit, both for analysis and synthesis filter banks in FI ADC, is an implementation of the strategy to design filters with low sensitivity to parameter changes. An additional advantage is designing the synthesis filter as stable infinite impulse response (IIR) instead of commonly used finite impulse response (FIR) filters. It provides several dozen-fold saving in the number of applied multipliers.. The analysis and synthesis filters in FI ADC are implemented as filter pairs. An additional example of three-filter bank demonstrates versatility of NANOstudio software

Date of online publication

2021

Pages (from - to)

323 - 334

DOI

10.1007/s10470-021-01902-2

URL

https://link.springer.com/article/10.1007/s10470-021-01902-2

License type

CC BY (attribution alone)

Open Access Mode

open journal

Open Access Text Version

final published version

Release date

07.2021 (Date presumed)

Date of Open Access to the publication

at the time of publication

Ministry points / journal

40.0

Ministry points / journal in years 2017-2021

40.0

Impact Factor

1.321