摘要
A CMOS quadrature LC-tank voltage-controlled oscillator topology which uses a planar spiral transformer as coupling elements has been implemented in mixed-signal and RF 1P6M 0.18μm CMOS technology of SMIC. The measured phase noise is -125.7 dBc/Hz at an offset frequency of 1 MHz from the carrier of 4.6 GHz while the VCO core circuit draws only of 10 mW from a 1.8 V supply. The measured phase error is approximately 1.5° based on the time domain outputs and the output power is about -2 dBm. The VCO can cover the frequency range of 4.36-4.68 GHz. The tuning range is 320 MHz （7.0%） and the FOM is -189 dB.
A CMOS quadrature LC-tank voltage-controlled oscillator topology which uses a planar spiral transformer as coupling elements has been implemented in mixed-signal and RF 1P6M 0.18μm CMOS technology of SMIC. The measured phase noise is -125.7 dBc/Hz at an offset frequency of 1 MHz from the carrier of 4.6 GHz while the VCO core circuit draws only of 10 mW from a 1.8 V supply. The measured phase error is approximately 1.5° based on the time domain outputs and the output power is about -2 dBm. The VCO can cover the frequency range of 4.36-4.68 GHz. The tuning range is 320 MHz （7.0%） and the FOM is -189 dB.
基金
supported by the National Natural Science Foundation of China (No. 60772008).
