Title :
The phase noise analysis in Colpitts VCO implemented by CMOS technology
Author :
Lee, Wah Ching ; Xuan, Kai ; Tsang, K.F. ; Guo, X.F.
Author_Institution :
Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Hong Kong, China
Abstract :
A Colpitts voltage controlled oscillator (VCO) is designed and fabricated by 0.18 ¿m CMOS technology. The linear time variant (LTV) model was used to analyze the phase noise. Under a supply voltage of 1.8 V, the frequency range of the VCO covers 340 ~ 400 MHz, the phase noise is -90 dBc/Hz at 10 kHz offset, and the output power is -2.5 dBm. The phase noise testing results are consistent with the theoretical calculating results. The chip size is 570 ¿m×300 ¿m.
Keywords :
CMOS analogue integrated circuits; voltage-controlled oscillators; CMOS technology; Colpitts VCO; Colpitts voltage controlled oscillator; frequency 10 kHz; frequency 340 MHz to 400 MHz; linear time variant model; phase noise analysis; size 0.18 mum; voltage 1.8 V; CMOS technology; Circuit topology; Frequency; Immune system; Integrated circuit noise; Noise generators; Phase noise; Power generation; Thermal resistance; Voltage-controlled oscillators; CMOS; Colpitts; Phase Noise; VCO;
Conference_Titel :
Information, Communications and Signal Processing, 2009. ICICS 2009. 7th International Conference on
Conference_Location :
Macau
Print_ISBN :
978-1-4244-4656-8
Electronic_ISBN :
978-1-4244-4657-5
DOI :
10.1109/ICICS.2009.5397554
