Title :
5-GHz Frequency Synthesizer With Auto-Calibration Loop
Author :
Kim, Myeungsu ; Lee, Kwengmook ; Kwon, Yongil ; Lim, Joonhyung ; Park, T.J.
Author_Institution :
Samsung Electro-Mech., Suwon
Abstract :
A 5-GHz frequency synthesizer for ZIGBEE(IEEE 802.15.4) was implemented. It consumes 13.5 mW adopting CMOS Logic divider and robust VCO from process and temperature variation by body voltage control of current source. It incorporates an automatic capacitor-bank tuning loop to extend frequency tuning range. This synthesizer was fabricated in 0.18-um technology; it consumes 7.5 mA at 1.8 V and offers 100 kHz-loop bandwidth and always -103 dBc/Hz at an offset of 1 MHz. the lock time is 30 us. The PLL output tuning range is 14% from 2.258 GHz to 2.614 GHz.
Keywords :
calibration; frequency synthesizers; phase locked loops; voltage-controlled oscillators; CMOS logic divider; PLL output tuning range; ZIGBEE; auto-calibration loop; automatic capacitor-bank tuning loop; bandwidth 100 kHz; current 7.5 mA; current source; frequency 2.258 GHz to 2.614 GHz; frequency 5 GHz; frequency synthesizer; frequency tuning range; phase locked loops; robust voltage-controlled oscillator; time 30 mus; voltage 1.8 V; voltage control; Bandwidth; CMOS logic circuits; CMOS process; CMOS technology; Frequency locked loops; Frequency synthesizers; Robust control; Tuning; Voltage control; Voltage-controlled oscillators; Frequency divider; automatic calibration; integer N PLL; phase locked loop; prescaler;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2007 IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0530-0
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2007.380982
