Title :
A switched-transformer, 76% tuning-range VCO in 90nm CMOS
Author :
Huo, Yiming ; Mattsson, Thomas ; Andreani, Pietro
Author_Institution :
Dept. of Electr. & Inf. Technol., Lund Univ., Lund, Sweden
Abstract :
This paper presents a prototype of multi-mode, multi-band CMOS VCO with a switched-transformer resonator, designed and fabricated in 90nm CMOS process. By combining the characteristics of switched-capacitors VCOs, transformer-based VCOs and switched-inductor VCOs, five VCO operation modes were realized, achieving a measured 76% tuning range spanning the bands 2.32-3.36 GHz, 3.45-4.55 GHz, and 4.89-5.83 GHz. The VCO draws a current ranging from 11.0mA to 23.4 mA from a 1.8 V supply, with a phase noise of -130.2 dBc/Hz (-118.3 dBc/Hz) at 1 MHz offset from the 2.32 GHz (5.83 GHz) carrier. The power-frequency-tuning-normalized figure-of-merit (PFTN-FoM) varies from -9.5 dB to 13.2 dB.
Keywords :
CMOS integrated circuits; circuit tuning; nanoelectronics; resonators; switched capacitor networks; transformers; voltage-controlled oscillators; CMOS; current 11 mA to 23.4 mA; frequency 1 MHz; frequency 2.32 GHz to 3.36 GHz; frequency 3.45 GHz to 4.55 GHz; frequency 4.89 GHz to 5.83 GHz; size 90 nm; switched-capacitors VCO; switched-inductor VCO; switched-transformer resonator; transformer-based VCO; voltage 1.8 V; CMOS integrated circuits; Frequency measurement; Phase noise; Switches; Tuning; Voltage-controlled oscillators;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2010 Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-1-4244-7590-2
Electronic_ISBN :
978-1-902339-22-2
