NDLI: Signal conditioning and data collection in synthetic instruments [ATE systems]

Content Provider	IEEE Xplore Digital Library
Author	Lowdermilk, R.W. Harris, F.J.
Copyright Year	2003
Description	Author affiliation: Mission Solutions, BAE SYSTEMS, San Diego, CA, USA (Lowdermilk, R.W.)
Abstract	Synthetic instruments apply the flexibility and computational capabilities of a digital signal-processing platform to synthesize a wide variety of synthetic instruments. The emphasis presented in traditional descriptions of a synthetic instrument is the architecture and the capabilities of the digital signal processing (DSP) platform and the user interfaces to the same. In this paper we highlight and discuss considerations of the signal conditioning and signal collection tasks. The focal point of the signal collection process is the analog-to-digital converter (ADC), the element that defines the precision and the bandwidth of the sampled data representation of the signal processed by the DSP platform. Analog signal conditioning prior to the ADC performs the task of limiting the input signal bandwidth and possible translation of the spectral band center. Digital signal conditioning following the ADC continues to perform the same tasks by further limiting the bandwidth of the digitized input signal as well as performing spectral translation with appropriate sample rate changes. In addition, the post conversion process can correct gain, phase, and time delay imbalances between input signal paths as well as gain and phase distortion encountered in the analog signal path. We identify and address performance constraints of existing ADCs and present a number of signal processing-based options to enhance and extend the operating regimes of the analog signal conditioning and the ADC conversion process.
Sponsorship	IEEE Aerosp. & Electron. Syst. Soc. IEEE Instrumentation & Meas. Soc. IEEE LEOS Angeles Council IEEE Orange County Sect
Starting Page	426
Ending Page	431
File Size	455246
Page Count	6
File Format	PDF
ISBN	0780378377
ISSN	10807725
DOI	10.1109/AUTEST.2003.1243608
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-09-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Instruments Signal processing Digital signal processing Bandwidth Limiting Signal synthesis Computer architecture User interfaces Analog-digital conversion Delay effects
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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