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A 900-MHz local oscillator using a DLL-based frequency multiplier technique for PCS applications

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2 Author(s)
G. Chien ; Marvell Semicond., Sunnyvale, CA, USA ; P. R. Gray

A monolithic CMOS local oscillator utilizing a delay-locked loop (DLL)-based frequency multiplier technique to synthesize a 900-MHz carrier frequency with a low close-in phase noise is described. The prototype, implemented in a double-poly five-metal 0.35-/spl mu/m CMOS technology, achieves a -123 and -127 dBc/Hz phase noise at 60 and 330 kHz offset frequencies, respectively, while dissipating 130 mW from a 3.3-V supply. This prototype satisfies the specification of the IS-137 AMPS/TDMA dual-mode standard.

Published in:

IEEE Journal of Solid-State Circuits  (Volume:35 ,  Issue: 12 )