Title :
A 7GHz wideband self-correcting quadrature VCO
Author :
Arai, Tamio ; Hajimiri, Ali
Author_Institution :
Fujitsu Labs. Ltd., Yokohama, Japan
Abstract :
A 4.0 to 6.6GHz self-correcting quadrature voltage controlled oscillator (QVCO) with phase compensation loop is implemented in a 65nm CMOS process. The topology couples IQ oscillation signals of two LC-VCOs, a phase shifter, and buffers with circular configuration. This paper introduces the idea to obtain low phase noise and accurate IQ phase quadrature oscillation signal, by employing phase compensation loop to correct the IQ phase error. The self-correcting QVCO achieves the IQ phase error less than a degree, and 1MHz offset phase noise -107dBc/Hz at 6.9GHz.
Keywords :
CMOS analogue integrated circuits; MMIC oscillators; field effect MMIC; phase noise; phase shifters; voltage-controlled oscillators; CMOS process; IQ phase quadrature oscillation signal; LC-VCO; circular configuration; frequency 4.0 GHz to 6.6 GHz; frequency 6.9 GHz; frequency 7 GHz; low phase noise; phase compensation loop; phase shifter; self-correcting quadrature voltage controlled oscillator; size 65 nm; wideband self-correcting QVCO; Detectors; Low pass filters; Phase noise; Phase shifters; Transconductance; Voltage-controlled oscillators;
Conference_Titel :
Electronics, Circuits and Systems (ICECS), 2012 19th IEEE International Conference on
Conference_Location :
Seville
Print_ISBN :
978-1-4673-1261-5
Electronic_ISBN :
978-1-4673-1259-2
DOI :
10.1109/ICECS.2012.6463798
