Characterization of digital signal processing in the DiDAC data acquisition system

Conference · Fri Jan 01 00:00:00 EST 1993 · Cytometry (Baltimore); (United States)

OSTI ID:6831565

Parson, J D; Olivier, T L; Habbersett, R C; Martin, J C; Wilder, M E; Jett, J H ^[1]

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1. Los Alamos National Lab., NM (United States)

A new generation data acquisition system for flow cytometers has been constructed. This Digital Data Acquisition and Control (DiDAC) system is based on the VME architecture and uses both the standard VME bus and a private bus for system communication and data transfer. At the front end of the system is a free running 20 MHz ADC. The output of a detector preamp provides the signal for digitization. The digitized waveform is passed to a custom built digital signal processing circuit that extracts the height, width, and integral of the waveform. Calculation of these parameters is started (and stopped) when the waveform exceeds (and falls below) a preset threshold value. The free running ADC is specified to have 10 bit accuracy at 25 MHZ. The authors have characterized it to the results obtained with conventional analog signal processing followed by digitization. Comparisons are made between the two approaches in terms of measurement CV, linearity and in other aspects.

• OSTI ID: 6831565
• Report Number(s): CONF-9303114-; CODEN: CYTODQ
• Journal Information: Cytometry (Baltimore); (United States), Vol. 6; Conference: 16. congress of the International Society for Analytical Cytology, Colorado Springs, CO (United States), 21-26 Mar 1993; ISSN 0196-4763
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
CYTOLOGICAL TECHNIQUES
DATA ACQUISITION SYSTEMS
COMPARATIVE EVALUATIONS
DIGITIZERS
COMPUTERS
ELECTRONIC CIRCUITS
EVALUATION
PULSE CIRCUITS
SIGNAL CONDITIONERS
550300* - Cytology
990301 - Information Handling- Data Handling- (1992-)