A CMOS self-contained quadrature signal generator for soc impedance spectroscopy

Márquez, A. (Universidad de Zaragoza) ; Pérez-Bailón, J. (Universidad de Zaragoza) ; Calvo, B. (Universidad de Zaragoza) ; Medrano, N. (Universidad de Zaragoza) ; Martínez, P.A. (Universidad de Zaragoza)

Resumen: This paper presents a low-power fully integrated quadrature signal generator for system-on-chip (SoC) impedance spectroscopy applications. It has been designed in a 0.18 µm-1.8 V CMOS technology as a self-contained oscillator, without the need for an external reference clock. The frequency can be digitally tuned from 10 to 345 kHz with 12-bit accuracy and a relative mean error below 1.7%, thus supporting a wide range of impedance sensing applications. The proposal is experimentally validated in two impedance spectrometry examples, achieving good magnitude and phase recovery results compared to the results obtained using a commercial LCR-meter. Besides the wide frequency tuning range, the proposed programmable oscillator features a total power consumption lower than 0.77 mW and an active area of 0.129 mm2, thus constituting a highly suitable choice as stimulation module for instrument-on-a-chip devices.

Idioma: Inglés

DOI: 10.3390/s18051382

Año: 2018

Publicado en: Sensors (Switzerland) 18, 5 (2018), 1382 [17 pp]
ISSN: 1424-8220

Factor impacto JCR: 3.031 (2018)

Categ. JCR: INSTRUMENTS & INSTRUMENTATION rank: 15 / 61 = 0.246 (2018) - Q1 - T1
Categ. JCR: CHEMISTRY, ANALYTICAL rank: 23 / 84 = 0.274 (2018) - Q2 - T1
Categ. JCR: ELECTROCHEMISTRY rank: 12 / 26 = 0.462 (2018) - Q2 - T2

Factor impacto SCIMAGO: 0.592 - Analytical Chemistry (Q2) - Atomic and Molecular Physics, and Optics (Q2) - Medicine (miscellaneous) (Q2) - Electrical and Electronic Engineering (Q2) - Instrumentation (Q2) - Biochemistry (Q2)

Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/TEC2015-65750-R

Tipo y forma: Article (Published version)

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