Title :
A 0.75 to 2.2GHz continuously-tunable quadrature VCO
Author :
Guermandi, Davide ; Tortori, Paola ; Franchi, Eleonora ; Gnudi, Antonio
Author_Institution :
Bologna Univ., Italy
Abstract :
The ±20% tuning range of a fully integrated quadrature LC-VCO is extended to ±50%. The quadrature VCO is inserted in a loop with an SSB mixer and two frequency dividers that add 100×100 μm2 area in a 0.13 μm CMOS process and draw 10mA from a 1.2V supply. Quadrature error is <2° and phase noise <-120dBc/Hz at 1 MHz offset.
Keywords :
CMOS integrated circuits; UHF mixers; circuit tuning; mobile radio; phase noise; voltage-controlled oscillators; 0.13 micron; 0.75 to 2.2 GHz; 1.2 V; 10 mA; CMOS process; SSB mixer; continuously tunable quadrature VCO; frequency dividers; fully integrated quadrature LC-VCO; phase noise; quadrature error; Bluetooth; Contracts; Current measurement; Current supplies; GSM; Local oscillators; Phase noise; Radiofrequency integrated circuits; Transceivers; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 2005. Digest of Technical Papers. ISSCC. 2005 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-8904-2
DOI :
10.1109/ISSCC.2005.1494106
