The design of quadrature local oscillators for CMOS wireless transceivers is still one of the most challenging issues. This paper focuses the advantages of injection locking techniques to achieve high-performance quadrature generators. A synchronizing oscillator sets spectral purity while locked oscillators set quadrature accuracy and drive the mixer LO input capacitances. Two different architectures, realized in a 0.18 mu m CMOS technology, are illustrated and compared. The first, using LC tank locked oscillators as frequency dividers, is tailored to UNITS and show high driving capability with low power. Simple and accurate equations for the design are reported. The second quadrature generator, employing coupled VCOs driven by an auxiliary VCO, is tailored to DCS1800 and achieves outstanding phase accuracy and phase noise. Experimental results compare favorably against previously published solutions. (c) 2006 Elsevier Ltd. All rights reserved.

CMOS injection locked oscillators for quadrature generation at radio-frequency / Mazzanti, Andrea; F., Svelto. - In: MICROELECTRONICS JOURNAL. - ISSN 0959-8324. - STAMPA. - 37:11(2006), pp. 1241-1250. [10.1016/j.mejo.2006.07.022]

CMOS injection locked oscillators for quadrature generation at radio-frequency

MAZZANTI, Andrea;
2006

Abstract

The design of quadrature local oscillators for CMOS wireless transceivers is still one of the most challenging issues. This paper focuses the advantages of injection locking techniques to achieve high-performance quadrature generators. A synchronizing oscillator sets spectral purity while locked oscillators set quadrature accuracy and drive the mixer LO input capacitances. Two different architectures, realized in a 0.18 mu m CMOS technology, are illustrated and compared. The first, using LC tank locked oscillators as frequency dividers, is tailored to UNITS and show high driving capability with low power. Simple and accurate equations for the design are reported. The second quadrature generator, employing coupled VCOs driven by an auxiliary VCO, is tailored to DCS1800 and achieves outstanding phase accuracy and phase noise. Experimental results compare favorably against previously published solutions. (c) 2006 Elsevier Ltd. All rights reserved.
37
11
1241
1250
CMOS injection locked oscillators for quadrature generation at radio-frequency / Mazzanti, Andrea; F., Svelto. - In: MICROELECTRONICS JOURNAL. - ISSN 0959-8324. - STAMPA. - 37:11(2006), pp. 1241-1250. [10.1016/j.mejo.2006.07.022]
Mazzanti, Andrea; F., Svelto
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/612573
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 3
social impact