The Switched-Resistor (S-R) technique is becoming more and more interesting to implement low-voltage low-power active-RC filters with high tuning range and front-end amplifiers for biomedical circuits and systems. This approach exploits MOS switches driven by a duty-cycle-controlled clock signal to achieve tunability of the equivalent resistance and, hence, of the RC time constant. Since S-R circuits can be considered as linear periodically time variant (LPTV) systems with sampled outputs, we exploit the theory of the adjoint (inter-reciprocal) network in order to develop a detailed model of the cyclostationary noise involved in this kind of circuits. The proposed model allows to gain insight into the different noise sources and transfer functions involved, highlighting the circuit parameters on which the cyclostationary noise depends. Validation of the proposed model has been carried out by comparing analytical results against periodic noise simulations referring to a commercial 130nm CMOS process. The validation activity has confirmed the good accuracy of the proposed noise model and provided some useful design guidelines to optimize the noise performance of S-R circuits.

A detailed model of cyclostationary noise in switched-resistor circuits / Fava, Alessandro; Centurelli, Francesco; Scotti, Giuseppe. - In: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS. I, REGULAR PAPERS. - ISSN 1558-0806. - 70:2(2023), pp. 667-679. [10.1109/TCSI.2022.3222590]

A detailed model of cyclostationary noise in switched-resistor circuits

Alessandro Fava;Francesco Centurelli;Giuseppe Scotti
2023

Abstract

The Switched-Resistor (S-R) technique is becoming more and more interesting to implement low-voltage low-power active-RC filters with high tuning range and front-end amplifiers for biomedical circuits and systems. This approach exploits MOS switches driven by a duty-cycle-controlled clock signal to achieve tunability of the equivalent resistance and, hence, of the RC time constant. Since S-R circuits can be considered as linear periodically time variant (LPTV) systems with sampled outputs, we exploit the theory of the adjoint (inter-reciprocal) network in order to develop a detailed model of the cyclostationary noise involved in this kind of circuits. The proposed model allows to gain insight into the different noise sources and transfer functions involved, highlighting the circuit parameters on which the cyclostationary noise depends. Validation of the proposed model has been carried out by comparing analytical results against periodic noise simulations referring to a commercial 130nm CMOS process. The validation activity has confirmed the good accuracy of the proposed noise model and provided some useful design guidelines to optimize the noise performance of S-R circuits.
2023
biomedical applications; large time constants; integrated circuits; switched-resistor; noise modeling; LPTV systems; cyclostationary noise
01 Pubblicazione su rivista::01a Articolo in rivista
A detailed model of cyclostationary noise in switched-resistor circuits / Fava, Alessandro; Centurelli, Francesco; Scotti, Giuseppe. - In: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS. I, REGULAR PAPERS. - ISSN 1558-0806. - 70:2(2023), pp. 667-679. [10.1109/TCSI.2022.3222590]
File allegati a questo prodotto
File Dimensione Formato  
Fava_A Detailed Model_2023.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 2.39 MB
Formato Adobe PDF
2.39 MB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1666923
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact