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Analyzes noise in relaxation oscillators, indicating improved low-noise designs.
The timing jitter in relaxation oscillators is analyzed. This jitter is described by a single normalized equation whose solution allows prediction of noise in practical oscillators. The theory is confirmed by measurements on practical oscillators and is used to develop a prototype low-noise oscillator with a measured jitter of 1.5 ppm RMS.
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Abidi et al. (1983) studied this question.
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