D. Gaied, M. Khairy, M. Atef, A. Ahmed, M. Shadoufa, A. Hassanein, O. El-Aassar, M. Gamal, A. El-Sayed, A. Badawy, A. Adel, M. Erfan, N. Sinoussi, A. Helmy
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引用次数: 2
Abstract
This work presents a highly stable monolithic integrated CMOS LC-based frequency reference. The frequency reference is based on a Self-Compensated Oscillator (SCO) architecture where the LC tank operates at a specific phase Phi-NULL where frequency sensitivity versus temperature is minimum. A new compensation technique is applied over Phi-Null to further optimize frequency stability and extend the temperature range. The new technique is based on an analog approach and induces a minimum impact on oscillator phase noise, current consumption and die area. Utilizing this technique, the temperature range has been extended to (-40-105°C) with a ±40ppm frequency stability. Achieved performance makes it possible for the SCO to be introduced to automotive applications where crystals suffer vibration induced stability issues.
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