Methods for Extended Tunability in Quadrature Oscillators Based on Enhanced Electronic Control of Time Constants
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F18%3APU127052" target="_blank" >RIV/00216305:26220/18:PU127052 - isvavai.cz</a>
Result on the web
<a href="http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8292930" target="_blank" >http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8292930</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/TIM.2018.2799058" target="_blank" >10.1109/TIM.2018.2799058</a>
Alternative languages
Result language
angličtina
Original language name
Methods for Extended Tunability in Quadrature Oscillators Based on Enhanced Electronic Control of Time Constants
Original language description
New methods for extending the tunability range in second-order voltage controlled oscillators (VCOs) with quadrature outputs are presented and compared in this paper. Linear dependence is the most common type of relation between frequency of oscillations (FO) and control voltage (or current) in communication subsystems (VCOs). However, there are other non-linear types of dependencies that are advantageous (quadratic, cubic, ...) and should be further studied. Positions of controllable blocks within the structure of the oscillator (providing parameters influencing time constants of integrators) in two scenarios are studied together. The impact of controllable parameters of these additional elements on FO as well as on produced output signal levels is evaluated. Simulation and experimental results are shown to confirm expected behavior of solutions in the case of the quadratic type of control of FO. Nowadays, standard linear control offers a tunability ratio 10:1 (for the same ratio of parameters that control the FO) only. However, in this paper the experimental tests yield a tunability ratio 80:1 (50 kHz – 4 MHz) for DC control voltage within the range 0.175 V to 1.75 V (10:1). The presented approach is very beneficial for low supply voltage systems requiring a wide range of tunability and also for utilizing active devices having limited range of adjustability of their controllable parameters while still requiring wide tunability.
Czech name
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Czech description
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Classification
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
Result continuities
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)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
ISSN
0018-9456
e-ISSN
1557-9662
Volume of the periodical
67
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
1495-1505
UT code for WoS article
000431903000024
EID of the result in the Scopus database
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