Publication detail

Tunable Oscillator Derived from Colpitts Structure with Simply Controllable Condition of Oscillation and Synthetic Inductor Based on Current Amplifier and Voltage Differencing Transconductance Amplifier

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

Original Title

Tunable Oscillator Derived from Colpitts Structure with Simply Controllable Condition of Oscillation and Synthetic Inductor Based on Current Amplifier and Voltage Differencing Transconductance Amplifier

English Title

Tunable Oscillator Derived from Colpitts Structure with Simply Controllable Condition of Oscillation and Synthetic Inductor Based on Current Amplifier and Voltage Differencing Transconductance Amplifier

Type

conference paper

Language

en

Original Abstract

Our contribution discusses modification of well-known Colpitts LC oscillator to fully electronically controllable type utilizing adjustable current amplifier and inductance simulator based on voltage differencing transconductance amplifier (VDTA) instead of common bipolar transistor and passive metal coil. Implementation of current amplifier allows independent and direct control of oscillation condition, simplifies design (capacitors can have equal values because condition is not dependent on them) and used inductance equivalent based on VDTA allows linear control of frequency of oscillation and quadrature outputs with unchangeable amplitudes during the tuning process. Theory was verified by PSpice simulations and experimental measurement.

English abstract

Our contribution discusses modification of well-known Colpitts LC oscillator to fully electronically controllable type utilizing adjustable current amplifier and inductance simulator based on voltage differencing transconductance amplifier (VDTA) instead of common bipolar transistor and passive metal coil. Implementation of current amplifier allows independent and direct control of oscillation condition, simplifies design (capacitors can have equal values because condition is not dependent on them) and used inductance equivalent based on VDTA allows linear control of frequency of oscillation and quadrature outputs with unchangeable amplitudes during the tuning process. Theory was verified by PSpice simulations and experimental measurement.

Keywords

Electronic control, VDTA, adjustable current amplifier, Colpitts oscillator, quadrature outputs

RIV year

2013

Released

29.11.2013

Publisher

The Chamber of Electrical Engineers Bursa Branch (EMO)

Location

Bursa, Turkey

ISBN

978-605-01-0504-9

Book

Proceeding of the 8th International Conference on Electrical and Electronics Engineering

Pages from

21

Pages to

25

Pages count

5

BibTex


@inproceedings{BUT103233,
  author="Roman {Šotner} and Jan {Jeřábek} and Norbert {Herencsár} and Jiří {Petržela} and Kamil {Vrba} and Zdeněk {Kincl}",
  title="Tunable Oscillator Derived from Colpitts Structure with Simply Controllable Condition of Oscillation and Synthetic Inductor Based on Current Amplifier and Voltage Differencing Transconductance Amplifier",
  annote="Our contribution discusses modification of well-known Colpitts LC oscillator to fully electronically controllable type utilizing adjustable current amplifier and inductance simulator based on voltage differencing transconductance amplifier (VDTA) instead of common bipolar transistor and passive metal coil. Implementation of current amplifier allows independent and direct control of oscillation condition, simplifies design (capacitors can have equal values because condition is not dependent on them) and used inductance equivalent based on VDTA allows linear control of frequency of oscillation and quadrature outputs with unchangeable amplitudes during the tuning process. Theory was verified by PSpice simulations and experimental measurement.",
  address="The Chamber of Electrical Engineers Bursa Branch (EMO)",
  booktitle="Proceeding of the 8th International Conference on Electrical and Electronics Engineering",
  chapter="103233",
  howpublished="electronic, physical medium",
  institution="The Chamber of Electrical Engineers Bursa Branch (EMO)",
  year="2013",
  month="november",
  pages="21--25",
  publisher="The Chamber of Electrical Engineers Bursa Branch (EMO)",
  type="conference paper"
}