Improved data-acquisition system for microprocessor-based applications using a least significant word algorithm

Author

Benedetti, Mario ; Morgenstern, Veronica M. ; Carrica, Daniel Oscar

Author_Institution

Lab. de Instrum. y Control, Univ. Nat. de Mar del Plata, Argentina

Volume

37

Issue

3

fYear

1988

fDate

9/1/1988 12:00:00 AM

Firstpage

464

Lastpage

466

Abstract

A novel technique to compress and expand a digitized signal is presented. The proposed methodology allows the storage memory to be cut in half and the sample frequency of the acquisition system to be doubled. It is useful in those cases in which the number of bits of the analog-to-digital converter is greater than the databus length of the microprocessor and the signal slew-rate is known. The proposed method also permits the clipping of unwanted spikes present in the signal. An application using a 12-bit analog-to-digital converter and an 8-bit microprocessor is given

Keywords

analogue-digital conversion; computerised instrumentation; computerised signal processing; data acquisition; data compression; 12-bit analog-to-digital converter; 8 bit; 8-bit microprocessor; data-acquisition system; least significant word algorithm; signal slew-rate; Analog-digital conversion; Application software; Frequency; Instruments; Microcomputers; Microprocessors; Signal processing; Signal resolution; Signal sampling; Throughput;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.7477

Filename

7477