N-path gmC filter modeling and analysis for direct delta-sigma receiver

Mikko Englund*, Olli Viitala, Kimmo Koli, Jussi Ryynänen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsProfessional

6 Citations (Scopus)


This paper presents the analysis and a model for obtaining the delta-sigma loop filter coefficients of a direct delta-sigma receiver (DDSR). The analysis is done by modeling a key element of the DDSR, the N-path filter, with an s-plane transfer function in the baseband. The s-plane model includes the most important non-idealities, such as switch resistances and the limited output resistances of the RF-stages. The model allows the designer to approximate the key parameters for DDSR and enables the optimization of the DDSR performance. As an example, the coefficients of a third-order DDSR are obtained by examining the s-plane and the corresponding z-plane signal and quantization noise transfer functions. The results are evaluated with circuit level simulations. © 2012 IEEE.

Original languageEnglish
Title of host publicationThe 10 th IEEE International NEWCAS 2012 Conference, Montreal, Canada, 17-20 June 2012
Number of pages4
ISBN (Print)9781467308595
Publication statusPublished - 2012
MoE publication typeD3 Professional conference proceedings
EventIEEE International New Circuits and Systems Conference - Montreal, Canada
Duration: 17 Jun 201220 Jun 2012
Conference number: 10


ConferenceIEEE International New Circuits and Systems Conference
Abbreviated titleNEWCAS


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