@ARTICLE{Handkiewicz2021:i6728,
	author="{Handkiewicz, Andrzej and Naumowicz, Mariusz}",
	title="{NANO-studio, the design environment of filter banks implemented in standard CMOS technology}",
	year="2021",
	type="artykuł naukowy",
	language="en",
	journal="{Analog Integrated Circuits and Signal Processing}",
	issn="0925-1030",
	volume="109",
	number="2",
	pages="323--334",
	doi="10.1007/s10470-021-01902-2",
	url="https://link.springer.com/article/10.1007/s10470-021-01902-2",
	keywords="CMOS analog circuit design  Current mode circuits  Standard digital CMOS technology  Filter banks  Frequency-interleaved ADC  Low power low sensitive circuits",
	abstract="{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}",
}