Microelectronics

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

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

The next are a few positive factors of research and layout of Quadrature Oscillators make it varied from the present literature on digital oscillators: (1) specialise in quadrature oscillators with exact quadrature and occasional phase-noise, required by means of sleek conversation platforms; (2) a close comparative research 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 whilst sector and price might be minimized (in cross-coupled RC oscillators either the quadrature-error and phase-noise are lowered, while in LC oscillators the coupling raises the phase-noise.

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

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

Phase-Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Phase-noise in a Single Relaxation Oscillator . . . . . . . . . . . . . . 2 Phase-noise in Quadrature Relaxation Oscillators . . . . . . . . . . . . . Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Introduction This chapter is dedicated to the study of quadrature relaxation oscillators, which consist of two cross-coupled RC relaxation oscillators [9].

17) This definition is usually applied to a general RLC circuit and relates the maximum energy stored (in C or L) and the energy dissipated (by R) in a period. As an example, we apply the definition to an RLC series circuit. The energy is stored in the inductor and the capacitor, and the maximum energy stored in the inductor and the capacitor is the same. 18) 0 where Ir ms is the root-mean-square current in the inductor. 21) 0 where Vr ms is the root-mean-square voltage in the capacitor, and Vr ms = Ir ms /(␻0 C).

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