Mixed-signal circuits and boards for high safety applications

Author

Lubaszewski, M. ; Kolarik, V. ; Mir, S. ; Nielsen, C. ; Courtois, B.

Author_Institution

DELET, Univ. Federal do Rio Grande do Sul, Porto Alegre, Brazil

fYear

1995

fDate

6-9 Mar 1995

Firstpage

34

Lastpage

39

Abstract

A design methodology for analogue on-line test is presented by means of a real circuit implementation. The test strategy is based on monitoring via a very small analogue checker the inputs of all operational amplifiers of a fully differential circuit. The self-checking properties of the functional circuit are evaluated for a hard/soft fault model. Since the analogue checker outputs a double-rail error indication, the compatibility with digital checkers is ensured and the design of self-checking mixed-signal circuits becomes very simple. The mixed-signal approach as extended to boards through the IEEE Std. 1149.1 digital test bus and a layout rule to avoid interconnect differential shorts

Keywords

biquadratic filters; built-in self test; differential amplifiers; fault diagnosis; mixed analogue-digital integrated circuits; operational amplifiers; safety systems; IEEE Std. 1149.1; analogue checker; analogue on-line test; circuit implementation; digital test bus; double-rail error indication; fully differential circuit; hard/soft fault model; high safety applications; layout rule; mixed-signal circuits; operational amplifiers; self-checking properties; Circuit faults; Circuit testing; Design methodology; Differential amplifiers; Electrical fault detection; Monitoring; Operational amplifiers; Safety; Switches; System testing;

fLanguage

English

Publisher

ieee

Conference_Titel

European Design and Test Conference, 1995. ED&TC 1995, Proceedings.

Conference_Location

Paris

Print_ISBN

0-8186-7039-8

Type

conf

DOI

10.1109/EDTC.1995.470423

Filename

470423