Results 151 to 160 of about 186,677 (204)
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Analysis and Design of Quadrature Oscillators
2008The following are some features of Analysis and Design of Quadrature Oscillators make it different from the existing literature on electronic oscillators: (1) focus on quadrature oscillators with accurate quadrature and low phase-noise, required by modern communication systems; (2) a detailed comparative study of quadrature LC and RC oscillators ...
Luis Oliveira +2 more
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Analysis and Design of an Optimally Coupled 5-GHz Quadrature LC Oscillator
IEEE Journal of Solid-State Circuits, 2002 A 5-GHz quadrature LC oscillator has been realized, in which the two LC stages are coupled with phase shifters. Analysis on the behavioral level shows that an N-stage LC oscillator is optimally coupled when each stage is connected with phase shifters ...
Pepijn van de Ven +2 more
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On the quadrature accuracy of in-phase coupled quadrature LC oscillator
Integration, 2020Abstract In this article, closed-form equations are proposed for phase and amplitude errors of an in-phase coupled quadrature LC oscillator. First of all, the injected current from coupling network to switching one is analytically calculated in a novel approach.
Mahsa Hadjmohammadi +2 more
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Quadrature Oscillator Realization Based on DDCC+
2020 28th Signal Processing and Communications Applications Conference (SIU), 2020In this work, a new DDCC+ based mixed-mode quadrature oscillator (QO) topology is proposed. The proposed QO circuit consists of three DDCC+s, two floating resistors, two grounded resistors and two grounded capacitors. When compared to the other DDCC based QOs in literature, the proposed DDCC+ based QO circuit in this work possesses the advantages of ...
Unuk, T, Abacı, A, Yüce, E
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Evolution of Oscillation in a Quadrature Oscillator
2011 24th Internatioal Conference on VLSI Design, 2011The growth of oscillation in a quadrature oscillator that employs phase shifters in the coupling-path between a pair of LC-loaded negative resistance cores, is analyzed. Such an oscillator is known to have two stable modes of oscillation. Under a noise-initiated startup from an unstable initial condition, quasiharmonic assumption and the Method of ...
Diptendu Ghosh, Ranjit Gharpurey
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A New Quadrature LC-Oscillator
2007 IEEE International Symposium on Circuits and Systems (ISCAS), 2007A new circuit topology for quadrature signal generation is presented. In the proposed circuit two identical negative-resistance oscillators are coupled to each other via capacitors in such a way that quadrature signals are generated. An analysis of the linearized model of the circuit is presented.
Malihe Zarre Dooghabadi, Sasan Naseh
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A quadrature RC-oscillator with capacitive coupling
Integration, 2016In this paper the capacitive coupling in quadrature RC-oscillators is investigated. The capacitive coupling has the advantages of being noiseless with a small area penalty and without increasing the power dissipation. The results show that a phase error below 1?
João Casaleiro +2 more
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Phase noise and accuracy in quadrature oscillators
2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512), 2004This paper proposes a complete analysis of quadrature-coupled LC oscillators. These oscillators operate off-resonance and for this reason, their phase noise worsens at increasing coupling strength. Since the coupling transistors raise the total power consumption, the noise-power product degrades further with respect to a stand-alone oscillator.
ROMANO', LUCA +4 more
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A quadrature relaxation oscillator-mixer in CMOS
Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03., 2003This paper describes the design of a quadrature cross-coupled oscillator circuit integrated which also realizes the mixer function in a phase lock loop (PLL). This should be able to provide a very accurate phase relation (
Luís Bica Oliveira +4 more
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A Tiny Quadrature Oscillator Using Low-Q Series LC Tanks [PDF]
IEEE Microwave and Wireless Components Letters, 2015 A new quadrature oscillator topology is proposed, which arranges four low-Q series LC tanks in a ring structure driven by inverters operating in class-D.
Massoud Tohidian, R Bogdan Staszewski
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