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1.
A comparison of frequency pullability in oscillators using a single AT-cut quartz crystal and those using two single AT-cut crystals connected in parallel with a series load capacitance or series load capacitance or series load inductance
Vojko Matko, 2006, izvirni znanstveni članek

Opis: This paper presents a comparison of frequency pullability in oscillators using asingle AT-cut crystal and those using two single AT-cut crystals connected in paralleloperated with a series load capacitance or series load inductance at fundamental frequenciesof 4, 10 and 19 MHz. Pullability describes how the operating frequency may be changed byvarying the load capacitance. The paper also gives impedance circuits for both single- anddual-crystal units. The experiment results show that the new approach using two singlequartz crystals connected in parallel increases the frequency pulling range by 30-200% pending on the type of oscillator. Also given is the crystal frequency stability at thesethree frequencies.
Ključne besede: quartz, AT cut, pulling range, two single-crystal unit oscillator
Objavljeno v DKUM: 22.06.2017; Ogledov: 672; Prenosov: 148
.pdf Celotno besedilo (155,12 KB)
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2.
Remote lab experiment RC oscillator for learning of control
Suzana Uran, Darko Hercog, Karel Jezernik, 2006, izvirni znanstveni članek

Opis: In the paper a remote lab experiment RC oscillator used to support Web based learning, to support learning by doing, to learn control design and to minimize the gap between theory and practice is presented. The experiment was designed with a special care for visualisation of important control design parameters in Bode plot and Root-Locus diagram. The experiment is based on MATLAB, LABview and DSP2 learning module. Using RC oscillator experiment RC circuit step response based or sinusoidal response based analysis, P controller design using Bode plot or Root-locus, relations between control design parameters and control performance and discrepancy between theory and practice could be covered. A homework based on RC oscillator experiment is presented and obtained experiences are discussed.
Ključne besede: control learning, RC oscillator, remote lab
Objavljeno v DKUM: 31.05.2012; Ogledov: 1562; Prenosov: 68
.pdf Celotno besedilo (2,40 MB)
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