Design of Oscillator with Active Inductor and Investigation of Noise Cancellation in Oscillators

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Binaie, Ali | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46908 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Sharif Bakhtiar, Mehrdad
Abstract:
In this thesis, at first, we study the active inductors have been reported in the literature. Then by choosing one of them and investigating its advantages and disadvantages, we changed the structure in a way to solve its problems. On the way by using this active inductor and a negative capacitor, we designed an oscillator in 1.5 GHz frequency that has -106 dBc/Hz phase noise at 1MHz offset and its FOM value is 160 dBc. Also this oscillator is capable of frequency tunability of oscillation from 500 MHz to 2.2 GHz. In this spectrum the phase noise is changing between -100 dBc/Hz and -110 dBc/Hz. In the second part, in the aim of improvement of phase noise of oscillator structures based on Active inductors, we survey study the possibility of noise cancelation structures in these sorts of oscillators. By choosing a usuall noise cancellation technic that has been used in low noise amplifiers, we analyzed and studied noise cancellation in oscillator structure
Keywords:
Oscillators ; Quality Factor ; Noise Removing ; Negative Capacitance Circuit ; Active Inductor

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