Luis B. Oliveira, Jorge R. Fernandes, Igor M. Filanovsky,'s Analysis and Design of Quadrature Oscillators (Analog PDF

By Luis B. Oliveira, Jorge R. Fernandes, Igor M. Filanovsky, Chris J. M. Verhoeven, Manuel M. Silva

ISBN-10: 140208515X

ISBN-13: 9781402085154

ISBN-10: 1402085168

ISBN-13: 9781402085161

The next are a few good points of research and layout of Quadrature Oscillators make it various from the present literature on digital oscillators: (1) specialize in quadrature oscillators with actual quadrature and coffee phase-noise, required by means of sleek verbal exchange structures; (2) a close comparative examine of quadrature LC and RC oscillators, together with cross-coupled LC quasi-sinusoidal oscillators, cross-coupled RC leisure oscillators, a quadrature RC oscillator-mixer, and two-integrator oscillators; (3) a radical research of the impression of mismatches at the phase-error and the phase-noise; (4) the belief that quadrature RC oscillators could be a functional substitute to LC oscillators while zone and value could be minimized (in cross-coupled RC oscillators either the quadrature-error and phase-noise are decreased, while in LC oscillators the coupling raises the phase-noise.

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Download PDF by Luis B. Oliveira, Jorge R. Fernandes, Igor M. Filanovsky,: Analysis and Design of Quadrature Oscillators (Analog

The next are a few good points of research and layout of Quadrature Oscillators make it diverse from the present literature on digital oscillators: (1) specialize in quadrature oscillators with exact quadrature and coffee phase-noise, required by means of sleek verbal exchange platforms; (2) a close comparative research of quadrature LC and RC oscillators, together with cross-coupled LC quasi-sinusoidal oscillators, cross-coupled RC rest oscillators, a quadrature RC oscillator-mixer, and two-integrator oscillators; (3) a radical research of the influence of mismatches at the phase-error and the phase-noise; (4) the belief that quadrature RC oscillators could be a functional replacement to LC oscillators while region and value might be minimized (in cross-coupled RC oscillators either the quadrature-error and phase-noise are diminished, while in LC oscillators the coupling raises the phase-noise.

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Extra info for Analysis and Design of Quadrature Oscillators (Analog Circuits and Signal Processing)

Example text

1 Introduction This chapter is dedicated to the study of quadrature relaxation oscillators, which consist of two cross-coupled RC relaxation oscillators [9]. In this book we will use interchangeably the designations cross-coupled relaxation oscillator and quadrature relaxation oscillator. Both single relaxation oscillators and the technique of synchronously coupling relaxation oscillators have been known for some time [8–10, 44, 47–51], but their research is still at an initial stage.

28 Quadrature generation using an RC-CR circuit C R vOUT1 vIN C vOUT2 R with the frequency towards 0◦ . The phase shift of each branch changes with the frequency, but the phase difference of the two outputs is always 90◦ . This approach provides a good quadrature relationship, but the amplitude of the outputs changes significantly with the frequency. The I and Q branches have, respectively, a low-pass and a high-pass characteristic. The two output amplitudes are only equal at the pole frequency, ␻ p = 1/RC.

1 High Level Model . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Quadrature Relaxation Oscillator without Mismatches . . . . . . . . . . 3 Quadrature Relaxation Oscillator with Mismatches . . . . . . . . . . . . 4 Simulation Results . . . . . . . . . . . . . . . . . . . . . . . . . Phase-Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Phase-noise in a Single Relaxation Oscillator .

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Analysis and Design of Quadrature Oscillators (Analog Circuits and Signal Processing) by Luis B. Oliveira, Jorge R. Fernandes, Igor M. Filanovsky, Chris J. M. Verhoeven, Manuel M. Silva


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