Advanced frequency equalizers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F18%3A00325080" target="_blank" >RIV/68407700:21230/18:00325080 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1109/ASDAM.2018.8544669" target="_blank" >http://dx.doi.org/10.1109/ASDAM.2018.8544669</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/ASDAM.2018.8544669" target="_blank" >10.1109/ASDAM.2018.8544669</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Advanced frequency equalizers

Popis výsledku v původním jazyce

A considerable proportion of data processed in contemporary electronic systems originate in analogue sensors and have to be pre-processed prior to digitization. Pre-processing usually means voltage amplification and some degree (sometimes rather considerable) of frequency response equalization. In many cases, like image processing and similar tasks, the sensor physical dimensions constitute a strict limitation to its ability to discern small details of the observed physical quantity. In order to keep the system overall resolution power as close to the physical limits of the particular sensor in question, efficient equalization of its spatial frequency response is required. As a difference from the simple common electronic circuits, the high-end frequency response of a sensor with non-zero effective aperture does not follow the minimum-phase behaviour. Attempts to equalize the high frequency limitations in such systems by common minimum-phase high-boost circuits lead to crude errors in response to transient phenomena in the sensed physical quantity, with detrimental effects to the accuracy of such a system. This paper shows several examples of relatively easy solutions of non-minimum-phase electronic equalizer circuits (some already patented, other patents pending) avoiding this problem. As an additional benefit, some of these new designs permit to create essentially flat phase response in the central frequency range of selective circuits, as well as other interesting zero-phase frequency dependent amplitude responses.

Název v anglickém jazyce

Advanced frequency equalizers

Popis výsledku anglicky

A considerable proportion of data processed in contemporary electronic systems originate in analogue sensors and have to be pre-processed prior to digitization. Pre-processing usually means voltage amplification and some degree (sometimes rather considerable) of frequency response equalization. In many cases, like image processing and similar tasks, the sensor physical dimensions constitute a strict limitation to its ability to discern small details of the observed physical quantity. In order to keep the system overall resolution power as close to the physical limits of the particular sensor in question, efficient equalization of its spatial frequency response is required. As a difference from the simple common electronic circuits, the high-end frequency response of a sensor with non-zero effective aperture does not follow the minimum-phase behaviour. Attempts to equalize the high frequency limitations in such systems by common minimum-phase high-boost circuits lead to crude errors in response to transient phenomena in the sensed physical quantity, with detrimental effects to the accuracy of such a system. This paper shows several examples of relatively easy solutions of non-minimum-phase electronic equalizer circuits (some already patented, other patents pending) avoiding this problem. As an additional benefit, some of these new designs permit to create essentially flat phase response in the central frequency range of selective circuits, as well as other interesting zero-phase frequency dependent amplitude responses.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

ASDAM 2018

ISBN

978-1-5386-7488-8

ISSN

—

e-ISSN

—

Počet stran výsledku

4

Strana od-do

31-34

Název nakladatele

Slovak Academy of Science

Místo vydání

Košice

Místo konání akce

Smolenice

Datum konání akce

21. 10. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—