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°.
Injection Locking LC Dividers for Low Power Quadrature Generation / Mazzanti, Andrea; P., Uggetti; P., Rossi; F., Svelto. - STAMPA. - (2003), pp. 563-566. (Intervento presentato al convegno Proceedings of the IEEE 2003 Custom Integrated Circuits Conference tenutosi a San Jose, CA, usa nel Settembre 2003) [10.1109/CICC.2003.1249461].
Injection Locking LC Dividers for Low Power Quadrature Generation
MAZZANTI, Andrea;
2003
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°.
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