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Wireless sensor network (WSN) can be widely used in many fields. Based on 0.18μm RF CMOS process, this paper presents a 4.8GHz 1V low phase noise LC voltage controlled oscillator (VCO) used in the frequency synthesizer for WSN applications. In order to work under 1V voltage, the LC VCO uses the structure of only one couple of NMOS differential negative resistances. The core circuit is biased by PMOS...
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