Abstract
This chapter starts with a general theory of high-Q oscillators that includes all nonlinear effects and a basic approach of phase noise. Then, three important circuit architectures that are compatible with MEMs or quartz crystal resonators are discussed. For each of them, a linear analysis is first carried out to obtain the critical transconductance for oscillation and the amount of frequency pulling from the mechanical resonance of the resonator. The dependency of the amplitude on the bias current is then derived from the transfer characteristics of the active transistor(s) by using the concept of transconductance for the fundamental component. A more detailed noise analysis is followed by the presentation of practical implementations, with one example of amplitude limitation circuitry. The respective merits of the three approaches are compared in a last section.
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Vittoz, E.A. (2013). The Design of Low-Power High-Q Oscillators. In: Enz, C., Kaiser, A. (eds) MEMS-based Circuits and Systems for Wireless Communication. Integrated Circuits and Systems. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-8798-3_5
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DOI: https://doi.org/10.1007/978-1-4419-8798-3_5
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