Title :
Integrated FSK demodulator with very high sensitivity
Author :
Gustat, Hans ; Herzel, Frank
Author_Institution :
Circuit Design Dept., IHP, Frankfurt Oder, Germany
fDate :
2/1/2003 12:00:00 AM
Abstract :
This paper presents a fully integrated highly sensitive frequency-shift keying (FSK) demodulator functioning at a modulation factor of 0.5%-0.1% and below. A dual-feedback phase-locked loop approach provides both very high sensitivity and sufficiently large tuning range. Experimental results in TSMC 0.25-μm CMOS technology demonstrate that Gaussian FSK signals of a modulation factor down to 0.06% can safely be demodulated.
Keywords :
Bluetooth; CMOS integrated circuits; circuit feedback; circuit tuning; demodulators; frequency shift keying; phase locked loops; radio receivers; sensitivity; 0.25 micron; Gaussian FSK signals; PLL demodulator; TSMC CMOS technology; dual-feedback PLL approach; dual-feedback phase-locked loop; frequency-shift keying demodulator; highly sensitive demodulator; integrated FSK demodulator; low-IF Bluetooth receivers; modulation factor; phase noise; tuning range; Bluetooth; Circuit optimization; Demodulation; Frequency modulation; Frequency shift keying; Phase locked loops; Phase modulation; Phase noise; Tuning; Voltage-controlled oscillators;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2002.807169
