Analysis of mismatch impact on image rejection ratio for passive polyphase filters

Martinez-Perez, A.D. (Universidad de Zaragoza) ; Aznar, F. ; Royo, G. (Universidad de Zaragoza) ; Sanchez-Azqueta, C. (Universidad de Zaragoza) ; Celma, S. (Universidad de Zaragoza)

Resumen: Passive polyphase filters (PPFs) are useful symmetric RC networks for processing analog quadrature signals. Passive polyphase filters are also used to implement differential-quadrature or quadrature-differential converters. The quality of these quadrature signals is essential to achieve good performance in modern communication systems. However, mismatch effects can produce notable degradation in the PPF frequency response, and this results in an important reduction in quadrature signal quality, being amplitude balance and phase offset notably affected. Both these errors could be summarized and evaluated together considering image rejection ratio as a figure of merit. This work deepens in the analysis of mismatch impact on PPF, studying image rejection ratio degradation for 2 PPF types, and a systematic method is proposed to obtain the worst case of mismatch in PPFs with any number of stages. It has been validated in a 65-nm CMOS technology.

Idioma: Inglés

DOI: 10.1002/cta.2505

Año: 2018

Publicado en: INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS 46, 10 (2018), 1838-1847
ISSN: 0098-9886

Factor impacto JCR: 1.554 (2018)

Categ. JCR: ENGINEERING, ELECTRICAL & ELECTRONIC rank: 172 / 265 = 0.649 (2018) - Q3 - T2

Factor impacto SCIMAGO: 0.331 - Applied Mathematics (Q2) - Electronic, Optical and Magnetic Materials (Q2) - Electrical and Electronic Engineering (Q2) - Computer Science Applications (Q2)

Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/TEC2014-52840-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/TEC2017-85867-R

Tipo y forma: Article (PostPrint)

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