Title :
A novel feedback low phase noise Ka-band push-push CMOS VCO
Author :
Kim, Sun Young ; Cho, Choon Sik ; Lee, Jae W. ; Kim, Jaeheung
Author_Institution :
Sch. of Electron. Telecommun. & Comput. Eng., Korea Aerosp. Univ., Goyang, South Korea
Abstract :
A Ka-band cross-coupled push-push LC Voltage Controlled Oscillator (VCO) with a novel feedback configuration is proposed to improve the phase noise performance. The main idea of the proposed novel feedback configuration is to increase negative conductance and cancel the loss conductance of LC tank. Conductance of LC tank decreases Q-value. Therefore, decreased total conductance increases Q-value in LC tank, which improves phase noise performance of the proposed VCO. The VCO is simulated in 0.18 ¿m CMOS technology with 1.8 V voltage supplied. The output power is -7.95 dBm at 24 GHz. The phase noise shows about -111.0 dBc/Hz at 1 MHz offset frequency. The tuning range is observed about 2.29 GHz from 22.5 GHz to 24.79 GHz.
Keywords :
CMOS analogue integrated circuits; feedback oscillators; microwave oscillators; phase noise; voltage-controlled oscillators; Ka-band cross-coupled push-push CMOS VCO; LC tank conductance; LC voltage controlled oscillator; Q-value; feedback configuration; low phase noise performance; size 0.18 mum; voltage 1.8 V; 1f noise; CMOS technology; Circuits; Frequency; MOSFETs; Negative feedback; Phase noise; Power generation; Tuning; Voltage-controlled oscillators; CMOS; Kaband; Negative conductance; Phase noise; Push-Push Voltage Controlled Oscillator;
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.2009.5384270
