NDLI: A prototype implementation of a two-channel frequency-translating hybrid ADC

Content Provider	IEEE Xplore Digital Library
Author	Mazlouman, S.J. Sheikhaei, S. Mirabbasi, S.
Copyright Year	2007
Description	Author affiliation: Univ. of British Columbia (UBC), Vancouver (Mazlouman, S.J.; Sheikhaei, S.; Mirabbasi, S.)
Abstract	In this paper, a proof-of-concept prototype of a two-channel frequency-translating hybrid (FTH) analog-to-digital converter (ADC) is implemented using off-the shelf components. The FTH structure is suitable for high-bandwidth ADCs. In this architecture, the wideband input signal is decomposed into smaller frequency subbands (channels). Each channel consists of a two-path system that frequency translates its input signal to baseband, lowpass filters each path signal using identical analog baseband filters, and samples and digitizes each path signal using identical baseband lower-speed ADC circuits. Unlike conventional parallel architectures, sampling is accomplished after splitting the signal into narrow baseband components alleviating the need for high-speed S/H circuitry. After digitizing the signal in each channel, the low-rate subband samples are upconverted back to their respective center frequencies, filtered, and recombined to reconstruct the digital representation of the original wideband input signal. The digital filters are optimized to minimize the reconstruction error. It is shown that the effects of many major analog non- idealities can be compensated in the digital domain.
Starting Page	144
Ending Page	147
File Size	394252
Page Count	4
File Format	PDF
ISBN	9781424411757
ISSN	15483746
DOI	10.1109/MWSCAS.2007.4488557
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-08-05
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Prototypes Frequency Wideband Bandwidth Baseband Digital filters CMOS technology Analog-digital conversion Sampling methods Filter bank
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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