A fully integrated 3 V 2.3 GHz synchronous oscillator for WLAN applications

In order to fully integrate a low power, low phase noise frequency synthesizer, a 2.3 GHz synchronous oscillator has been fully implemented on a 0.8 /spl mu/m, two metal layer standard BiCMOS technology. It is able to lock on a subharmonic external signal and its locking range is about 40 MHz for a 400 MHz injected signal. The oscillator and its synchronization circuit consume less than 14 mA on a 3 V battery.

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