Title :
Energy circulation quadrature LC-VCO
Author :
Yao, Chih-Wei ; Willson, Alan N., Jr.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA
Abstract :
An energy circulation technique is shown to unite an even number of oscillation tanks to form an integrated oscillator. It reduces phase noise and boosts the figure-of-merit beyond that which is achievable by a differential VCO while generating quadrature phase. The measured phase noise of a two-way configuration at 1 MHz offset is -132.6 dBc/Hz while drawing 27.7 mW from a 1.8 V supply. In simulation, the four-way configuration further reduces the phase noise by 3 dBc/Hz. Techniques for correcting the +/-90deg phase ambiguity problem and I/Q phase mismatch are also presented
Keywords :
phase noise; voltage-controlled oscillators; 1 MHz; 1.8 V; 27.7 mW; LC-VCO; energy circulation quadrature; figure-of-merit; four-way configuration; oscillation tanks; phase ambiguity problem; phase mismatch; phase noise; Bidirectional control; Clocks; MOS devices; Noise measurement; Phase detection; Phase noise; Radio frequency; Resonance; Tail; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693507
