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Noise analysis of a class of oscillators

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3 Author(s)
A. Dec ; Dept. of Electr. Eng., Columbia Univ., New York, NY, USA ; L. Toth ; K. Suyama

This paper presents noise analysis of a class of oscillators, which can be modeled by a positive feedback system with a frequency-selective Mth-order filter, an ideal comparator, and a white noise source. An explicit analytical expression for the output power spectral density is derived. A simplified expression is obtained for a special case when the Mth-order filter is replaced by a second-order bandpass filter. The general expression is shown to reduce to a well-known result if a high and-factor filter is further assumed. Theoretical results presented here are verified by experiment

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IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing  (Volume:45 ,  Issue: 6 )