earticle

영어

This paper presents a mm-wave fractional PLL frequency synthesizer that has a tuning range capable of covering the whole band for 60 GHz communication systems. The synthesizer operates at 20 GHz with phase noise of -58 and -96.2 dBc/Hz at in-band and 1-MHz frequency offset, respectively. The proposed PLL consists of mm-wave 16/17 pre-scalar, 4 bit controllable VCO with constant Kv, and I/Q LO distribution network. An accurate I/Q phase LO network is constructed using resonate loading poly-phase filters and current driving buffers. Implemented in a 90 nm CMOS technology, the PLL and LO network consume 30 mW and 10 mW power from a 1.2 V supply.