Publication detail

UNIVERSAL ARC FILTERS FOR ARC OSCILATORS WITH AUTOMATIC SEQUENTIAL FILTRATION

FROHLICH, L. SEDLÁČEK, J. FRIEDL, M.

Original Title

UNIVERSAL ARC FILTERS FOR ARC OSCILATORS WITH AUTOMATIC SEQUENTIAL FILTRATION

English Title

UNIVERSAL ARC FILTERS FOR ARC OSCILATORS WITH AUTOMATIC SEQUENTIAL FILTRATION

Type

journal article

Language

en

Original Abstract

There are situations, when it is not possible to use standard types of filters, mainly because of demands on using of digital tuning of complex filter and concurrently usage of higher amount of transfer functions, which can be low pass LP, high-pass HP, band-pass BP, band-reject BR, but also low or high-pass notch LPN / HPN and allpass AP. For this purpose, we mostly use 2nd order ARC filters, which contain three or more operational amplifiers (OA). Concerning these blocks, tuning or control of this filter is usually the easiest. Except very familiar known filters as Akerberg Mossberg, Kervin Huelsman Newcomb or Towa Thoma, there is a further amount of circuit connections of universal ARC filters, which enable to realize the transfer function of biquad. The article mainly deals with some other circuits, which are not so familiar, but can be also successfully used as universal filters. These filters realizing required circuit functions with the possibility of tuning of basic parameters of the circuit have been used in special circuits with ARC oscillators for very low distortion with maximum suppression of third harmonics.

English abstract

There are situations, when it is not possible to use standard types of filters, mainly because of demands on using of digital tuning of complex filter and concurrently usage of higher amount of transfer functions, which can be low pass LP, high-pass HP, band-pass BP, band-reject BR, but also low or high-pass notch LPN / HPN and allpass AP. For this purpose, we mostly use 2nd order ARC filters, which contain three or more operational amplifiers (OA). Concerning these blocks, tuning or control of this filter is usually the easiest. Except very familiar known filters as Akerberg Mossberg, Kervin Huelsman Newcomb or Towa Thoma, there is a further amount of circuit connections of universal ARC filters, which enable to realize the transfer function of biquad. The article mainly deals with some other circuits, which are not so familiar, but can be also successfully used as universal filters. These filters realizing required circuit functions with the possibility of tuning of basic parameters of the circuit have been used in special circuits with ARC oscillators for very low distortion with maximum suppression of third harmonics.

Keywords

ARC oscilator, universal filter

RIV year

2011

Released

10.09.2011

Pages from

1008

Pages to

1012

Pages count

5

BibTex


@article{BUT73045,
  author="Lubomír {Fröhlich} and Jiří {Sedláček} and Martin {Friedl}",
  title="UNIVERSAL ARC FILTERS FOR ARC OSCILATORS WITH AUTOMATIC SEQUENTIAL FILTRATION",
  annote="There are situations, when it is not possible to use standard types of filters, mainly because of demands on using of digital tuning of complex filter and concurrently usage of higher amount of transfer functions, which can be low pass  LP, high-pass  HP, band-pass  BP, band-reject BR, but also low or high-pass notch  LPN / HPN and allpass  AP. For this purpose, we mostly use 2nd order ARC filters, which contain three or more operational amplifiers (OA). Concerning these blocks, tuning or control of this filter is usually the easiest.
Except very familiar known filters as Akerberg  Mossberg, Kervin  Huelsman  Newcomb or Towa Thoma, there is a further amount of circuit connections of universal ARC filters, which enable to realize the transfer function of biquad. The article mainly deals with some other circuits, which are not so familiar, but can be also successfully used as universal filters. These filters realizing required circuit functions with the possibility of tuning of basic parameters of the circuit have been used in special circuits with ARC oscillators for very low distortion with maximum suppression of third harmonics.",
  chapter="73045",
  number="2011",
  volume="2011",
  year="2011",
  month="september",
  pages="1008--1012",
  type="journal article"
}