A class of predictive analog filters for sensor signal processing and control instrumentation

Author

Vainio, Olli ; Ovaska, Seppo J.

Author_Institution

Signal Process. Lab., Tampere Univ. of Technol., Finland

Volume

44

Issue

4

fYear

1997

fDate

8/1/1997 12:00:00 AM

Firstpage

565

Lastpage

570

Abstract

A class of analog continuous-time filters is introduced, having predictive properties for specified narrow-band signal models, such as low-order polynomials or sinusoids. Such filters are designed by using model transfer functions designed in the discrete-time domain. Z-to-s-domain mapping is done using the inverse bilinear transformation. The analog filters are implemented with active-RC structures, using the state-variable structure for biquads and a single-op-amp structure for real poles and zeros. The application examples include a filter for zero-crossing detectors, polynomial predictors for sensor signal smoothing, and an optimized sixth-order ramp-tracking filter for anti-aliasing and anti-imaging in digital signal processor (DSP) systems where high selectivity is required

Keywords

RC circuits; analogue processing circuits; antialiasing; biquadratic filters; continuous time filters; operational amplifiers; poles and zeros; prediction theory; sensors; signal processing; smoothing methods; time-domain analysis; tracking filters; transfer functions; DSP systems; Z-to-s-domain mapping; active filters; active-RC structures; analog continuous-time filters; anti-aliasing; anti-imaging; biquads; control instrumentation; discrete-time domain; inverse bilinear transformation; low-order polynomials; low-order sinusoids; measurement system data handling; model transfer functions; narrow-band signal models; optimized sixth-order ramp-tracking filter; poles; polynomial predictors; predictive analog filters; predictive control; sensor signal processing; sensor signal smoothing; single-op-amp structure; state-variable structure; zero-crossing detectors; zeros; Detectors; Digital filters; Narrowband; Poles and zeros; Polynomials; Predictive models; Sensor systems and applications; Signal processing; Smoothing methods; Transfer functions;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.605635

Filename

605635