Publication detail

Electronically controlled oscillator with linear frequency adjusting for four-phase or differential quadrature output signal generation

ŠOTNER, R. HERENCSÁR, N. JEŘÁBEK, J. KOTON, J. DOSTÁL, T. VRBA, K.

Original Title

Electronically controlled oscillator with linear frequency adjusting for four-phase or differential quadrature output signal generation

English Title

Electronically controlled oscillator with linear frequency adjusting for four-phase or differential quadrature output signal generation

Type

journal article in Web of Science

Language

en

Original Abstract

This paper introduces novel four-phase oscillator employing two Dual-Output Controlled Gain Current Follower Buffered Amplifiers (DO-CG-CFBAs), single Current Amplifier, three resistors, and two grounded capacitors suitable for differential quadrature signal production (floating outputs). To control the frequency of oscillation (FO) and condition of oscillation (CO), only the current gain adjustment of active elements is used. The circuit was designed by well-known state variable approach. The oscillator employs three active elements for linear control of FO and to adjust CO and provides low-impedance voltage outputs. Furthermore, two straightforward ways of automatic amplitude gain control were used and compared. Active elements with very good performance are implemented to fulfill required features. Suitable CMOS implementation of introduced DO-CG-CFBA was shown. Important characteristics of the designed oscillator were verified experimentally and by PSpice simulations to confirm theoretical and expected presumptions.

English abstract

This paper introduces novel four-phase oscillator employing two Dual-Output Controlled Gain Current Follower Buffered Amplifiers (DO-CG-CFBAs), single Current Amplifier, three resistors, and two grounded capacitors suitable for differential quadrature signal production (floating outputs). To control the frequency of oscillation (FO) and condition of oscillation (CO), only the current gain adjustment of active elements is used. The circuit was designed by well-known state variable approach. The oscillator employs three active elements for linear control of FO and to adjust CO and provides low-impedance voltage outputs. Furthermore, two straightforward ways of automatic amplitude gain control were used and compared. Active elements with very good performance are implemented to fulfill required features. Suitable CMOS implementation of introduced DO-CG-CFBA was shown. Important characteristics of the designed oscillator were verified experimentally and by PSpice simulations to confirm theoretical and expected presumptions.

Keywords

electronic control, adjusting, Current Amplifier, Dual-Output Controlled Gain Current Follower Buffered Amplifier (DO-CG-CFBA), differential signals, quadrature oscillator

RIV year

2013

Released

16.12.2014

Publisher

John Wiley and Sons

Location

John Wiley & Sons, Ltd. The Atrium Southern Gate Chichester PO19 8QG, United Kingdom

ISBN

0098-9886

Periodical

International Journal of Circuit Theory and Applications.

Year of study

42

Number

12

State

GB

Pages from

1264

Pages to

1289

Pages count

26

URL

Documents

BibTex


@article{BUT99493,
  author="Roman {Šotner} and Norbert {Herencsár} and Jan {Jeřábek} and Jaroslav {Koton} and Tomáš {Dostál} and Kamil {Vrba}",
  title="Electronically controlled oscillator with linear frequency adjusting for four-phase or differential quadrature output signal generation",
  annote="This paper introduces novel four-phase oscillator employing two Dual-Output Controlled Gain Current Follower Buffered Amplifiers (DO-CG-CFBAs), single Current Amplifier, three resistors, and two grounded capacitors suitable for differential quadrature signal production (floating outputs). To control the frequency of oscillation (FO) and condition of oscillation (CO), only the current gain adjustment of active elements is used. The circuit was designed by well-known state variable approach. The oscillator employs three active elements for linear control of FO and to adjust CO and provides low-impedance voltage outputs. Furthermore, two straightforward ways of automatic amplitude gain control were used and compared.
Active elements with very good performance are implemented to fulfill required features. Suitable CMOS implementation of introduced DO-CG-CFBA was shown. Important characteristics of the designed oscillator were verified experimentally and by PSpice simulations to confirm theoretical and expected presumptions.",
  address="John Wiley and Sons",
  chapter="99493",
  doi="10.1002/cta.1919",
  institution="John Wiley and Sons",
  number="12",
  volume="42",
  year="2014",
  month="december",
  pages="1264--1289",
  publisher="John Wiley and Sons",
  type="journal article in Web of Science"
}