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

Volume

53

Issue

3

fYear

2006

fDate

3/1/2006 12:00:00 AM

Firstpage

197

Lastpage

201

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;

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2005.858320

Filename

1605433