Publication detail

Linearly Tunable Quadrature Oscillator Derived from LC Colpitts Structure Using Voltage Differencing Transconductance Amplifier and Adjustable Current Amplifier

ŠOTNER, R. JEŘÁBEK, J. HERENCSÁR, N. PETRŽELA, J. VRBA, K. KINCL, Z.

Original Title

Linearly Tunable Quadrature Oscillator Derived from LC Colpitts Structure Using Voltage Differencing Transconductance Amplifier and Adjustable Current Amplifier

Type

journal article in Web of Science

Language

English

Original Abstract

The paper deals with an interesting oscillator solution derived from LC Colpitts circuit structure. Electronically controllable current gain of the current amplifier is utilized for driving of oscillation condition together with two transconductances in frame of voltage differencing transconductance amplifier for adjusting of frequency of oscillation. In the proposed structure these elements replace common bipolar transistor and metal coil. Designed circuit offers important advantages, i.e. absence of metal coil, quadrature outputs, amplitudes of generated signals independent of tuning process, linear electronic control of oscillation frequency (independent of oscillation condition). Implementation of circuit for amplitude stabilization and automatic control of oscillation condition for designed circuit is simple. These benefits are not available in classical LC Colpitts structures or in many well-known third-order oscillators. The theoretical conclusions are supported by experiments with behavioral representation employing commercially available devices and also by simulations using CMOS model.

Keywords

Adjustable current amplifier, Voltage Differencing Transconductance Amplifier, quadrature oscillator, electronic control, third-order oscillator, colpitts oscillator.

Authors

ŠOTNER, R.; JEŘÁBEK, J.; HERENCSÁR, N.; PETRŽELA, J.; VRBA, K.; KINCL, Z.

RIV year

2014

Released

3. 7. 2014

Location

Springer

ISBN

0925-1030

Periodical

ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING

Year of study

81

Number

1

State

Kingdom of the Netherlands

Pages from

121

Pages to

136

Pages count

16

URL

http://link.springer.com/article/10.1007%2Fs10470-014-0353-6#page-1

BibTex

@article{BUT108296,
  author="Roman {Šotner} and Jan {Jeřábek} and Norbert {Herencsár} and Jiří {Petržela} and Kamil {Vrba} and Zdeněk {Kincl}",
  title="Linearly Tunable Quadrature Oscillator Derived from LC Colpitts Structure Using Voltage Differencing Transconductance Amplifier and Adjustable Current Amplifier",
  journal="ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING",
  year="2014",
  volume="81",
  number="1",
  pages="121--136",
  doi="10.1007/s10470-014-0353-6",
  issn="0925-1030",
  url="http://link.springer.com/article/10.1007%2Fs10470-014-0353-6#page-1"
}