A Quadrature Charge-Domain Sampling Mixer With Embedded FIR, IIR, and N-Path Filters

This paper presents the analysis and design of a quadrature charge-domain down-conversion sampling mixer with embedded finite-impulse-response (FIR), infinite-impulse-response (IIR), and 4-path bandpass filters. An in-depth investigation of the principles of periodic impulse sampling, periodic windo...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. I, Regular papers Regular papers, 2015-05, Vol.62 (5), p.1431-1440
Main Authors: Yushi Zhou, Filiol, Norman M., Fei Yuan
Format: Article
Language:English
Subjects:
Attenuation
Band-pass filters
Bandpass filters
Bandwidth
Baseband
Capacitors
Charge-domain windowed sampling
Design engineering
Finite impulse response filters
IIR filters
Mixers
N-path filter
Noise levels
Quadratures
Samplers
Sampling
software-defied radio
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Summary:This paper presents the analysis and design of a quadrature charge-domain down-conversion sampling mixer with embedded finite-impulse-response (FIR), infinite-impulse-response (IIR), and 4-path bandpass filters. An in-depth investigation of the principles of periodic impulse sampling, periodic windowed sampling, and periodic N-path windowed sampling is presented and their characteristics are compared. A detailed mathematical treatment of charge-domain windowed samplers with built-in sinc, FIR and IIR filters is provided. A quadrature charge-domain sampler with embedded FIR, IIR, and 4-path band-pass filters is proposed and its performance including the effect of the non-idealities of devices is investigated. The proposed design is implemented in an IBM 130 nm 1.2 V CMOS technology. Simulation results demonstrate that the proposed design is tunable over 50-250 MHz frequency range. For an 100 MHz input, the proposed design exhibits 70 dB aliasing rejection, 60 dB stop band attenuation while consuming current of 145 μA. The performance of the proposed design is further validated using the results of on-wafer measurement of the fabricated microchip.
ISSN:1549-8328
1558-0806
DOI:10.1109/TCSI.2015.2407432