A 2.4GHz to 3.86GHz digitally controlled oscillator with 18.5kHz frequency resolution using single PMOS varactor
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概要
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A novel varactor using single PMOS is proposed. By utilizing the capacitance difference between saturation and linear region, the proposed varactor can improve frequency resolution of a LC-tank based digitally controlled oscillator without introducing extra fixed loading capacitance. A digitally controlled oscillator with the proposed varactor is designed using 0.13µm CMOS technology for verification. Measurement results show that the minimum frequency resolution is achieved around 18.5kHz in a frequency range of 2.4GHz to 3.86GHz, indicating the minimum achievable capacitance step of 30aF. The measured phase noise is -120.6dBc/Hz at 1MHz offset for 3.05GHz carrier. The power consumption is 2.9mW.
著者
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Li Ning
State Key Laboratory For Agrobiotechnology College Of Biological Science China Agricultural Universi
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LI Wei
State Key Lab of High Performance Ceramics & Superfine Microstructure, Shanghai Institute of Ceramic
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Ren Junyan
State Key Lab of ASIC and System, Fudan University
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Niu Yangyang
State Key Laboratory of ASIC & System, Fudan University
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Li Ning
State Key Laboratory of ASIC & System, Fudan University
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