Title :
Low phase noise Ku-band Gm-boosting differential Colpitts VCO
Author :
Chiou, Hwann-Kaeo ; Chen, Sheng-Chi
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ., Jhongli, Taiwan
Abstract :
A Ku-band gm-boosting differential Colpitts voltage controlled oscillator (VCO) is presented, that relaxes oscillation start-up current requirement in Colpitts oscillator. Experimental results from a 0.18-¿m CMOS process validate the gm-boosting design principle. The VCO oscillates at the frequency of 13.725 GHz with 6% tuning range. The current dissipation of the VCO is 4.5 mA from a 0.9 V power supply. The measurements at 13.3 GHz show the phase noise of -84.8 and -113.8 dBc/Hz at 100 kHz and 1 MHz offset, respectively. The calculated figure of merit (FOM) of this VCO is high as -190.2 dB. The chip size including test pads is 0.62 × 0.72 mm2.
Keywords :
CMOS analogue integrated circuits; microwave oscillators; phase noise; voltage-controlled oscillators; CMOS process; Ku-band Gm-boosting differential Colpitts VCO; figure of merit; frequency 13.725 GHz; low phase noise VCO; size 0.18 mum; voltage controlled oscillator; CMOS process; Frequency; Noise measurement; Phase measurement; Phase noise; Power supplies; Semiconductor device measurement; Testing; Tuning; Voltage-controlled oscillators; CMOS; differential Colpitts VCO; gm-boosting;
Conference_Titel :
Microwave Conference, 2009. APMC 2009. Asia Pacific
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2801-4
Electronic_ISBN :
978-1-4244-2802-1
DOI :
10.1109/APMC.2009.5385316
