Results 141 to 150 of about 1,826 (183)
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Quadrature Delay-Locked Oscillator
CLEO 2025A voltage-controlled oscillator (VCO) is stabilized using optical delay lines, improving the VCO temperature stability by more than a factor of three. A four-tap delay line provides quadrature optical signals suitable for on-chip clocking applications.
Henry Love, Firooz Aflatouni
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Exponentially tunable voltage controlled quadrature oscillator
2017 40th International Conference on Telecommunications and Signal Processing (TSP), 2017This paper deals with appropriate method of tunability extension in quadrature oscillators. Exponential dependence of frequency of oscillations on DC control voltage is created in lossless integrators by utilization of two exponentially controlled variable gain amplifiers and diamond transistors.
Roman Sotner +5 more
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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 B. Oliveira +4 more
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A Familiy of SiGe Quadrature Oscillators for Microwave Applications
2005 IEEE International Symposium on Circuits and Systems, 2005A family of quadrature oscillators for operation in the 14-26 GHz range has been designed in a 0.25 /spl mu/m SiGe BICMOS technology with an f/sub t/ of 47 GHz. These oscillators employ a transmission line tank, an emitter degenerated cross-coupled pair, and SiGe HBT or CMOS 50 /spl Omega/ buffers.
Brian Welch +2 more
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A low-voltage quadrature log-domain oscillator
9th International Conference on Electronics, Circuits and Systems, 2003A new quadrature oscillator is proposed in bipolar technology. It exploits the exponential nature of bipolar transistors and thus it is suitable for low distortion operation at low supply voltage. The resulting circuits are very simple in structure and easy to design.
Nikos Fragoulis, Ioannis Haritantis
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On the numerical quadrature of highly-oscillating integrals II: Irregular oscillators
IMA Journal of Numerical Analysis, 2005The purpose of the present paper is to delve deeper into highly-oscillatory quadrature and to analyse the behaviour of the Filon quadrature for irregular oscillators of the form \[ I_g[f]:= \int^1_0 f(x) e^{i\omega g(x)}\,dx, \] where \(g\) is a real, nonzero function, \(f\) is a complex-valued function, both sufficiently smooth, and \(w\gg 1\).
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A 44 GHz Quadrature Traveling Wave Oscillator
2013 26th International Conference on VLSI Design and 2013 12th International Conference on Embedded Systems, 2013This paper presents a technique for quadrature phase generation in an LC oscillator by sharing a single turn inductor between a pair of oscillators. This special structure of the inductor cancels the magnetic flux within the loop, and thereby allows placement of other components beneath it.
Somnath Kundu, Shouri Chatterjee
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On Phase Noise in Quadrature Cross-Coupled Oscillators
2005 IEEE International Symposium on Circuits and Systems, 2005A cross-coupled relaxation oscillator has two outputs of the same frequency, which are in quadrature. In this paper a comparative study of the phase noise in a cross-coupled relaxation oscillator is given. We present a high level (system) study of the oscillator and analyse the oscillator stability.
Luís Bica Oliveira +3 more
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A Complementary-Coupled CMOS LC Quadrature Oscillator
IEICE Transactions on Electronics, 2008SUMMARY A novel CMOS LC quadrature oscillator (QO) whichadopts complementary-coupling circuitry has been proposed. The perfor-mance improvement in I/Q phase error and phase noise of the proposedQO, is explained in comparison with conventional QOs. The proposedQO is implemented in 0.18μm CMOS technology along with conventionalQOs. The measurement result
Yun, SJ Yun, Seok-Ju +2 more
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A 3.2-to-7.3GHz Quadrature Oscillator with Magnetic Tuning
2007 IEEE International Solid-State Circuits Conference. Digest of Technical Papers, 2007A quadrature oscillator employs a transformer-capacitor network as an energy tank. Frequency tuning is done by varying the transformer magnetic field via the ratio of currents in the two windings. Realized prototypes have a 3.2 to 7.3GHz frequency tuning range, a phase noise FOM of 176.5dB at 3.2GHz, 170.5dB at 6.4GHz, and 164dB at 7GHz, all calculated
Giuseppe Cusmai +3 more
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