Title :
A 6.5-GHz LC VCO with Integrated-Transformer Tuning
Author :
Tu, Chia-Chieh ; Yang, Ching-Yuan
Author_Institution :
Dept. of Electr. Eng., National Chung-Hsing Univ., Taichung
Abstract :
This paper presents a LC-tank voltage-controlled oscillator (VCO) with a transformer-based tuning topology implemented in 0.18-mum CMOS process. The proposed topology uses an integrated transformer to provide voltage-controlled inductance value. The measured phase noise is mu122.85 dBc at 1-MHz offset from a 6.45-GHz carrier and its tuning range is 600MHz from 6.11 to 6.71 GHz
Keywords :
CMOS integrated circuits; circuit tuning; microwave oscillators; phase noise; transformers; voltage-controlled oscillators; 0.18 micron; 6.11 to 6.71 GHz; 600 MHz; CMOS process; LC-tank voltage-controlled oscillator; integrated-transformer tuning; phase noise; transformer-based tuning topology; voltage-controlled inductance value; Coils; Frequency; Inductance; Inductors; Parasitic capacitance; Phase noise; Tunable circuits and devices; Tuning; Varactors; Voltage-controlled oscillators; LC VCO; transformer;
Conference_Titel :
Circuits and Systems, 2006. APCCAS 2006. IEEE Asia Pacific Conference on
Conference_Location :
Singapore
Print_ISBN :
1-4244-0387-1
DOI :
10.1109/APCCAS.2006.342520
