An EXELFS multiscalar DMA interface for the IBM PC-AT using programmable gate arrays

Author

Hovander, B. ; Bohm, C.

Author_Institution

Dept. of Phys., Stockholm Univ., Sweden

Volume

37

Issue

6

fYear

1990

fDate

12/1/1990 12:00:00 AM

Firstpage

2191

Lastpage

2197

Abstract

An IBM PC-AT interface for data acquisition from diode arrays is described. It was developed for use in an extended energy loss fine structure (EXELFS) spectrometer, where sometimes two diode arrays (containing EXELFS and low-loss spectra) need simultaneous scanning. The system operates as a multiscaler, allowing two processes to be recorded at the same time. The interface was designed using a programmable gate array (an 1800 gate-equivalent logic cell array from XILINX) to implement most of the digital circuitry and a 12-b ADC to sample the analog inputs. A 12-b DAC was used for analog outputs and for diagnostic testing purposes. The interface hardware was given a general design so that it could be used in other similar applications

Keywords

IBM computers; computer interfaces; computerised spectroscopy; data acquisition; logic arrays; microcomputer applications; ADC; EXELFS spectrometer; IBM PC-AT interface; analog outputs; data acquisition; design; diagnostic testing; diode arrays; logic cell array; multiscalar DMA interface; multiscaler; programmable gate array; Circuit testing; Data acquisition; Diodes; Energy loss; Hardware; Logic circuits; Logic design; Logic gates; Programmable logic arrays; Spectroscopy;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.101255

Filename

101255