Title :
Injection locking LC dividers for low power quadrature generation
Author :
Mazzanti, A. ; Uggetti, P. ; Rossi, P. ; Svelto, F.
Author_Institution :
Dipatimento di Ingegneria dell´´Informazione, Universita di Modena e Reggio Emilia, Italy
Abstract :
The trade off between phase noise and quadrature accuracy, typical of coupled voltage controlled oscillators, is broken if injection locking dividers are used for I and Q generation. Based on the general behavioral modeling of regenerative frequency dividers, this paper derives analytical expressions for locking band and phase deviation from quadrature. An injection locking quadrature generator, embedded in a 0.18 μm CMOS direct conversion receiver, shows 24% frequency locking range while drawing 4 mA. The phase deviation from quadrature measured on down-converted signals is 0.8°.
Keywords :
CMOS integrated circuits; frequency dividers; injection locked oscillators; low-power electronics; phase noise; 0.18 micron; 4 mA; CMOS direct conversion receiver; I/Q generation; coupled voltage controlled oscillators; frequency locking range; injection locking LC dividers; injection locking frequency dividers; locking band; low power quadrature generation; phase noise; quadrature accuracy; quadrature phase deviation; regenerative frequency dividers; CMOS technology; Capacitance; Energy consumption; Frequency conversion; Injection-locked oscillators; Phase measurement; Phase noise; Power generation; Semiconductor device modeling; Voltage-controlled oscillators;
Conference_Titel :
Custom Integrated Circuits Conference, 2003. Proceedings of the IEEE 2003
Print_ISBN :
0-7803-7842-3
DOI :
10.1109/CICC.2003.1249461
