Design and Analysis of CCII-Based Oscillator with Amplitude Stabilization Employing Optocouplers for Linear Voltage Control of the Output Frequency

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dc.contributor.authorŠotner, Romancs
dc.contributor.authorJeřábek, Jancs
dc.contributor.authorLanghammer, Lukášcs
dc.contributor.authorDvořák, Jancs
dc.coverage.issue9cs
dc.coverage.volume7cs
dc.date.accessioned2020-08-04T11:00:55Z
dc.date.available2020-08-04T11:00:55Z
dc.date.issued2018-08-22cs
dc.description.abstractThis paper shows the topology design of a simple second-order oscillator based on two three-port current conveyors, two resistors, and two grounded capacitors, as well as its modification to a voltage-controlled oscillator (VCO). In comparison with many previous works, the following useful conceptual novelties and improvements were made in this study. Both resistors presented in the topology can be employed to tune of the oscillation frequency by the simultaneous driving of two optocouplers with resistive output stage. The current gain of the current conveyor ensures the control of the oscillation condition. The proposed solution offers advantages (in comparison with many standard so-called single-resistance-controllable types) of improved dependence of the frequency of oscillation (FO) on a driving force (extended tuning of the FO), constant ratio of amplitudes of generated waveforms when the FO is tuned, low complexity (taking into account auxiliary circuitry for optocouplers), and comfortable tuning of the FO by a single control voltage. The oscillator produces waveforms with tunable frequency having a constant 45-degree phase shift between them. The relative sensitivities of the proposed solution achieve typical values for these second-order systems (0.5). Experimental verification confirmed the expected behavior in the operational band between 1 and 10 MHz tuned by a DC voltage from 1.7 to 5 V. This indicates a significant reduction of the driving force ratio (3:1 in our case) in comparison with standard tuning approaches required for a ratio of 10:1 for FO adjustment. Output amplitudes reached 100 and 150 mV in the observed tunability range with distortion ranging between 0.7 and 3.3%en
dc.formattextcs
dc.format.extent1-20cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationElectronics (MDPI). 2018, vol. 7, issue 9, p. 1-20.en
dc.identifier.doi10.3390/electronics7090157cs
dc.identifier.issn2079-9292cs
dc.identifier.other149310cs
dc.identifier.urihttp://hdl.handle.net/11012/84175
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofElectronics (MDPI)cs
dc.relation.urihttp://www.mdpi.com/2079-9292/7/9/157cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2079-9292/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectCurrent conveyorsen
dc.subjectfrequency controlen
dc.subjectoptocoupleren
dc.subjectoscillatoren
dc.subjectsingle-resistance-controlled oscillatoren
dc.subjectSRCOen
dc.subjecttuningen
dc.subjectVCOen
dc.titleDesign and Analysis of CCII-Based Oscillator with Amplitude Stabilization Employing Optocouplers for Linear Voltage Control of the Output Frequencyen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-149310en
sync.item.dbtypeVAVen
sync.item.insts2020.08.04 13:00:55en
sync.item.modts2020.08.04 12:25:20en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav radioelektronikycs
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav telekomunikacícs
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