Chip Design of Low-Phase Noise Colpitts Voltage Controlled Oscillator with Folded-Mirror Mixer

摘要

This article presents a low phase noise voltage-controlled oscillator (VCO) adopting optimization colpitts with gm boosting techniques. The excellent performance of the VCO core adopts a phase noise of −123.4 dBc/Hz at 1MHz offset frequency and output power of −6.67dBm from a 5.73 GHz carrier with a 4.7mW power consumption, achieving in an excellent FOM of −191.84 dBc/Hz and displayed by FOMT of −194.61 dBc/Hz. The proposed folded-current mirror mixer produces a conversion power gain of −3 ∼ 0.8 dB, input P1dB of −6 ∼ −4 dBm, IIP3 of −1.4 ∼ 1.8 dBm, LO-RF isolation of 30 dB, respectively. The overall prototypes of colpitts oscillators with folded-current mirror mixer have been fabricated in tsmc $mathrm{0.18}mumathrm{m}$ CMOS 1P6M process and implemented from supply voltage of 1V.