Title :
Noise contributors in a 7.2 GHz low-power VCO with automatic amplitude control
Author :
Murji, Rizwan ; Deen, M. Jamal
Author_Institution :
Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont., Canada
Abstract :
In this paper, the major noise sources in a VCO with automatic amplitude control (AAC) circuit, fabricated in a commercial CMOS deep n-well 0.18 μm technology with access to the body of NMOS transistors, is described. The analysis shows that there is an optimal point where the noise due to the AAC is minimal and equal to that of a VCO with no AAC. The oscillator consumes 4.32 mW at 1.8 V, has a tuning range of 410 MHz and a phase noise level of -108 dBc/Hz at 1 MHz from a 7.2 GHz carrier.
Keywords :
CMOS analogue integrated circuits; MMIC oscillators; automatic gain control; circuit optimisation; circuit tuning; low-power electronics; phase noise; voltage-controlled oscillators; 0.18 micron; 1.8 V; 4.32 mW; 7.2 GHz; AAC circuit; CMOS; NMOS transistor body access; VCO noise contributors; automatic amplitude control; back-gated VCO; body-bias; low-power VCO; phase noise optimization; tuning range; Automatic control; Circuit noise; Circuit optimization; Frequency; Integrated circuit noise; MOSFETs; Noise level; Phase noise; Tuning; Voltage-controlled oscillators;
Conference_Titel :
Radio Frequency integrated Circuits (RFIC) Symposium, 2005. Digest of Papers. 2005 IEEE
Print_ISBN :
0-7803-8983-2
DOI :
10.1109/RFIC.2005.1489826
