Wide-band compact 1.8 V-0.18 µm CMOS analog front-end for impedance spectroscopy

Perez-Bailon, J. ; Sanz-Pascual, M. T. ; Calvo, B. (Universidad de Zaragoza) ; Medrano, N. (Universidad de Zaragoza)

Resumen: 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.

Idioma: Inglés

DOI: 10.1109/TCSII.2021.3107613

Año: 2022

Publicado en: IEEE Transactions on Circuits and Systems II: Express Briefs 69, 3 (2022), 764-768
ISSN: 1549-7747

Factor impacto JCR: 4.4 (2022)

Categ. JCR: ENGINEERING, ELECTRICAL & ELECTRONIC rank: 84 / 274 = 0.307 (2022) - Q2 - T1

Factor impacto CITESCORE: 6.5 - Engineering (Q1)

Factor impacto SCIMAGO: 1.266 - Electrical and Electronic Engineering (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MCIU/PID2019-106570RB-I00-AEI-10.13039-501100011033

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Electrónica (Dpto. Ingeniería Electrón.Com.)