Design of a Low-Phase-Noise LC VCO for UHF RFID Reader
Xiaopeng Zhou
Abstract
Xiaopeng Zhou
Abstract
A low phase noise CMOS LC Voltage Controlled Oscillator for 860~960MHz UHF RFID(Radio Frequency Identification)reader is designed.The quadrature output differential signal is achieved through SCL(Source-Coupled Logic)frequency divider by two.The circuit is implemented with the SMIC 0.18μm CMOS technology and the simulator of Cadence SpectreRF.The simulation results show the frequency range from 1620~2020MHz before frequency divider and phase noise of-127.5dBc/Hz@1MHz offset at oscillation frequency of 1.8GHz.VCO has the frequency rang from 810~1010MHz after frequency divider by two and the phase noise of-133.5dBc/Hz@1MHz offset at the frequency of 900MHz.
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A low phase noise CMOS LC Voltage Controlled Oscillator for 860~960MHz UHF RFID(Radio Frequency Identification)reader is designed.The quadrature output differential signal is achieved through SCL(Source-Coupled Logic)frequency divider by two.The circuit is implemented with the SMIC 0.18μm CMOS technology and the simulator of Cadence SpectreRF.The simulation results show the frequency range from 1620~2020MHz before frequency divider and phase noise of-127.5dBc/Hz@1MHz offset at oscillation frequency of 1.8GHz.VCO has the frequency rang from 810~1010MHz after frequency divider by two and the phase noise of-133.5dBc/Hz@1MHz offset at the frequency of 900MHz.
Key concepts: Voltage-controlled oscillator, Phase noise, Frequency divider, Ultra high frequency, Frequency offset, CMOS, Frequency multiplier, Electrical engineering