Active-only variable-gain low-pass filter for dual-mode multiphase sinusoidal oscillator application

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F17%3APU123755" target="_blank" >RIV/00216305:26220/17:PU123755 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.3906/elk-1702-159" target="_blank" >http://dx.doi.org/10.3906/elk-1702-159</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3906/elk-1702-159" target="_blank" >10.3906/elk-1702-159</a>

Result language
angličtina
Original language name
Active-only variable-gain low-pass filter for dual-mode multiphase sinusoidal oscillator application
Original language description
This research presents the active-only low-pass (LP) filter whose pole frequency and gain are independently tunable by means of the bias current manipulation. The realization of the proposed LP filter required one operational amplifier (OA), two operational transconductance amplifiers (OTA), and two MOS transistors. The multiphase sinusoidal oscillator (MSO) was subsequently realized by cascading n LP filters (n = 3) and loop-backing the output of the last LP filter to the input of the first LP filter. Simulations were carried out and the results revealed that the MSO could simultaneously achieve the low impedance voltage and high impedance current outputs without the circuit topology alteration. The frequency of oscillation (FO) and the condition of oscillation (CO) could also be electronically tuned without disturbing each other. Furthermore, the sinusoidal signal of the MSO exhibited a relatively low total harmonic distortion (THD) of around 0.8% at 2.75MHz. To verify, a prototype of the active-only LP-based MSO (n = 3) was constructed and the experiments performed. The experimental findings were agreeable with the simulation results.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20201 - Electrical and electronic engineering

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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