W. Lai, S. Jang, Ho Chang Lee, Wei-Te Liu, C. Hsue
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A high performance VCO using adaptive class C technique for sensor application
This paper presents a 1.1V low power Voltage Control Oscillator (VCO) is designed and implemented in a 0.18μmCOMS 1P6M process. The proposed circuits are using adaptive class C technique that can reduce power consumption. At the supply voltage 1.1V, the output frequency is 2.155GHz and the phase noise is -129 dBc/Hz at 1MHz offset. Tuning range is about 155MHz (6.9%) between 2.155 to 2.31GHz while control voltage was tuned from 0 to 2V. Excluding output buffers the VCO consumes the power 0.5 mW under a standard supply of 1.1 V.
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