Exponentially tunable voltage controlled quadrature oscillator
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2017-07-01 |
| Authors | Roman Å otner, Jan JeÅĆ”bek, JiÅĆ Petržela, Ondrej Domansky, Winai Jaikla |
| Institutions | Brno University of Technology, College of Polytechnics Jihlava |
| Citations | 3 |
Abstract
Section titled āAbstractāThis paper deals with appropriate method of tunability extension in quadrature oscillators. Exponential dependence of frequency of oscillations on DC control voltage is created in lossless integrators by utilization of two exponentially controlled variable gain amplifiers and diamond transistors. Proposed solution maintains all beneficial features (especially independent levels of output waveforms on tuning process) of the oscillator concept employing two lossless integrators in the single loop and electronically controllable negative resistor serving for adjusting of condition of oscillations. PSpice verifications based on simulations of macromodels of used active devices confirmed doubled tunability range in comparison to standard linear control of frequency obtained for the same change of DC driving voltage.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2012 - Quadrature oscillator based on modified double current controlled current feedback amplifier
- 2009 - Explicit-current-output quadrature oscillator using second-generation current conveyor transconductance amplifier
- 2012 - Study of adjustable gains for control of oscillation frequency and oscillation condition in 3R-2C oscillator