Download PDF by Liang Dai: Design of High-Performance CMOS Voltage-Controlled

By Liang Dai

ISBN-10: 1461354145

ISBN-13: 9781461354147

ISBN-10: 1461511453

ISBN-13: 9781461511458

Design of High-Performance CMOS Voltage-Controlled Oscillators provides a section noise modeling framework for CMOS ring oscillators. The research considers either linear and nonlinear operation. It exhibits that quick rail-to-rail switching should be completed to reduce part noise. also, in traditional layout the glint noise within the bias circuit can almost certainly dominate the part noise at low offset frequencies. for this reason, for slender bandwidth PLLs, noise up conversion for the unfairness circuits will be minimized. We outline the potent Q issue (Qeff) for ring oscillators and expect its bring up for CMOS tactics with smaller function sizes. Our part noise research is tested through simulation and dimension results.
The electronic switching noise coupled throughout the energy provide and substrate is generally the dominant resource of clock jitter. enhancing the provision and substrate noise immunity of a PLL is a not easy activity in adverse environments similar to a microprocessor chip the place hundreds of thousands of electronic gates are present.

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Extra info for Design of High-Performance CMOS Voltage-Controlled Oscillators

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Before further analyzing the oscillator phase noise, it is necessary to look closely at the definitions for both terms and understand their relationship. 1. 1) Both its amplitude and phase can be conupted by noise. 2) The amplitude noise and the phase noise are treated differently in practical systems. The amplitude noise can be removed easily by a hard limiter, while the phase noise, once introduced, is likely to remain. There is usually some amplitude noise converted into phase noise when the signal is processed by a limiter.

B. Leeson, B. Razavi and A. Hajimiri. Finally we describe our research motivation that distinguishes our research from previous work. 1. Challenges in Oscillator Phase Noise Analysis All oscillators are feedback systems. 1. 1 at the frequency of oscillation woo This is called Barkhausen's criteria. Positive feedback is formed under these conditions. Any signal at frequency Wo will sustain its initial amplitude and maintain oscillation. 1. A linear feedback system In practical designs, the oscillator has to start oscillation without any help of external stimuli.

We can derive their relationship with MATLAB simulations. 4GH z which is 40dB below its level. 5. We then pass the signal and the noise through an amplitude limiter to remove the amplitude noise, assuming that there is no amplitude noise to phase noise conversion during the hard limiting. 5. The limiter has two effects on the noise spectrum. 4GHz by 6dB. Meanwhile, it mirrors the noise spectrum with respect to the carrier frequency. If we consider white thermal noise in the vicinity of the frequency of oscillation, it has equal PSD on both sidebands.

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Design of High-Performance CMOS Voltage-Controlled Oscillators by Liang Dai


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