A 0.93-mA Spur-Enhanced Frequency Synthesizer for L1/L5 Dual-Band GPS/Galileo RF Receiver

摘要

A versatile frequency synthesizer for a L1/L5 dual-band GPS/Galilleo dual-mode RF receiver is designed with a 0.13 $mu{rm m}$ CMOS process. For spur reduction, a simple low-glitch charge-pump circuit (CPC) is proposed in this letter. The fabricated chip achieves the in-band phase noise of $-$92 dBc/Hz and the spur performance of $-$71.23 dBc at 8.184 MHz offset from 1.571 GHz carrier with a second-order loop filter.