Home Microelectronics • Analysis And Design Of Quadrature Oscillators by Luis B. Oliveira, Jorge R. Fernandes, Igor M. Filanovsky,

Analysis And Design Of Quadrature Oscillators 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 subsequent positive aspects of research and layout of Quadrature Oscillators make it diversified from the present literature on digital oscillators: concentrate on quadrature oscillators with exact quadrature and coffee phase-noise, required through smooth communique platforms; an in depth 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; a radical research of the impression of mismatches at the phase-error and the phase-noise; the belief that quadrature RC oscillators could be a useful replacement to LC oscillators while zone and value might 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); use of a established layout method, during which a expertise self sufficient examine, with perfect blocks, is played at first, after which the circuit point layout is addressed; and inclusion of many experimental effects, bought from varied built-in circuit prototypes, within the GHz diversity.

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Extra info for Analysis And Design Of Quadrature Oscillators

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1 High Level Model . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Circuit Implementation . . . . . . . . . . . . . . . . . . . . . . . Quadrature Relaxation Oscillator . . . . . . . . . . . . . . . . . . . . . . . 1 High Level Model . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Quadrature Relaxation Oscillator without Mismatches . .

3 Quadrature Relaxation Oscillator Fig. 3) Since it is assumed that the switching is provided by a vanishingly small value of i SL2 − i SL1 the minimum value of νC1 is −2I R. Considering now the second transition of νC2 by zero (instant t3 in Fig. 10) i SL1 increases and i SL2 decreases. 5) Since the switching occurs with a small value of R(i SL2 − i SL1 ), the maximum value of νC1 is νC1 = 2I R. 5), we can conclude that the amplitude of νC1 does not change due to the coupling. The same result can be determined for νC2 , by doing the calculations at the instants t2 and t4 of Fig.

4 Simulation Results . . . . . . . . . . . . . . . . . . . . . . . . . Phase-Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Phase-noise in a Single Relaxation Oscillator . . . . . . . . . . . . . . 2 Phase-noise in Quadrature Relaxation Oscillators . . . . . . . . . . . . . Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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