Multi-standard/multi-band adaptive voltage-controlled oscillator

An adaptive, multi-standard voltage-controlled oscillator satisfying phase-noise requirements of both 2/sup nd/ and 3/sup rd/ generation wireless standards is described (i.e., 1.8 GHz DCS1800, 2.2 GHz WCDMA, and 2.4 GHz WLAN, Bluetooth and DECT standards). A factor of 12 reduction in power consumption with a phase-noise tuning range of 20 dB is realized by adapting the VCO bias to the desired application. The VCO achieves -123 dBc/Hz, -110 dBc/Hz and -103 dBc/Hz phase noise at 1 MHz offset from a 2.2 GHz carrier at supply currents of 6 mA, 1.2 mA and 0.5 mA, respectively.

[1]  J. Long,et al.  Differentially-shielded monolithic inductors , 2003, Proceedings of the IEEE 2003 Custom Integrated Circuits Conference, 2003..

[2]  K. Halonen,et al.  A dual-band RF front-end for WCDMA and GSM applications , 2001 .

[3]  A. Abidi,et al.  Physical processes of phase noise in differential LC oscillators , 2000, Proceedings of the IEEE 2000 Custom Integrated Circuits Conference (Cat. No.00CH37044).

[4]  Xudong Wang,et al.  A fully integrated GSM/DCS/PCS Rx VCO with fast switching auto-band selection , 2002, Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573).