121024 20240319080956.0 doi 10.1109/TCSII.2021.3107613 sideral 127327 ART-2022-127327 eng Perez-Bailon, J. (orcid)0000-0002-8617-5703 Wide-band compact 1.8 V-0.18 µm CMOS analog front-end for impedance spectroscopy 2022 Access copy available to the general public Unrestricted In this letter, a fully integrated configurable front-end for Impedance Spectroscopy (IS) is presented. The circuit includes fully differential in-phase and quadrature channels, using a transconductor (TC)-transimpedance (TI) approach. The input TC, shared for both channels, is based on a programmable degenerated differential pair to attain low-noise programmable-gain, while identical TII/Q with embedded synchronous rectification provide both I, Q outputs, filtered through fc adjustable Gm-C integrators. It exhibits a programmable gain ranging from 0 dB to 40 dB with 87 MHz bandwidth, amplitude and phase recovery errors below 1.9% and 2.5∘ respectively and an input referred noise floor of 16.7 nV/Hz. The result is a high-performance very compact topology with a total power consumption of 292 μW at a 1.8 V power supply, thus constituting an appropriate solution for full on chip multichannel IS systems. info:eu-repo/grantAgreement/ES/MCIU/PID2019-106570RB-I00-AEI-10.13039-501100011033 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 4.4 2022 ENGINEERING, ELECTRICAL & ELECTRONIC 84 / 274 = 0.307 2022 Q2 T1 1.266 2022 Electrical and Electronic Engineering 2022 Q1 6.5 2022 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Sanz-Pascual, M. T. Calvo, B. Universidad de Zaragoza (orcid)0000-0003-2361-1077 Medrano, N. Universidad de Zaragoza (orcid)0000-0002-5380-3013 5008 250 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Electrónica 69, 3 (2022), 764-768 IEEE trans. circuits syst., II Express briefs IEEE Transactions on Circuits and Systems II: Express Briefs 1549-7747 2381959 http://zaguan.unizar.es/record/121024/files/texto_completo.pdf Postprint 2883519 http://zaguan.unizar.es/record/121024/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:121024 articulos driver 2024-03-18-13:40:49 ARTICLE