Title :
A mixed-signal GFSK demodulator for Bluetooth
Author :
Lee, Tai-Cheng ; Chen, Chin-Chi
Author_Institution :
Dept. of Electr. Eng. & GIEE, Nat. Taiwan Univ., Taipei, Taiwan
fDate :
3/1/2006 12:00:00 AM
Abstract :
A discrete-time mixed-signal Gaussian frequency-shift keying demodulator designed for a low intermediate frequency Bluetooth receiver performs FSK demodulation. Employing passive sampling and time-domain differentiation techniques, the demodulator performs quadrature demodulation while tolerating up to 200-kHz frequency offset. A distributed array of interleaved sampling circuits and a low-voltage multiplier allow both low-voltage operation and low power dissipation. Fabricated in a CMOS 0.25-μm technology, the demodulator only dissipates 6 mW from a 2-V power supply.
Keywords :
Bluetooth; demodulators; frequency shift keying; mixed analogue-digital integrated circuits; 0.25 micron; 2 V; 6 mW; Bluetooth; FSK demodulation; Gaussian frequency-shift keying demodulator; interleaved sampling circuits; low power dissipation; low-voltage multiplier; mixed-signal GFSK demodulator; passive sampling; quadrature demodulation; time-domain differentiation; Bluetooth; CMOS technology; Calibration; Circuits; Demodulation; Frequency shift keying; Sampling methods; Time domain analysis; Transmitters; Voltage; Bluetooth; Gaussian frequency-shift keying (GFSK) demodulator;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2005.858320
