A 6.5-GHz energy-efficient BFSK modulator for wireless sensor applications

Author

Cho, SeongHwan ; Chadrakasan, Anantha P.

Author_Institution

Mil. of South Korea, Seoul, South Korea

Volume

39

Issue

5

fYear

2004

fDate

5/1/2004 12:00:00 AM

Firstpage

731

Lastpage

739

Abstract

A 6.5-GHz FSK modulator suitable for low power wireless sensor network is presented. The energy efficient modulator employs closed-loop direct VCO modulation to achieve high data rate, multistage variable loop bandwidth technique for fast startup time and Σ-Δ for reduced power consumption in the synthesizer with fine resolution in frequency channel selection. The modulator, implemented using 0.25-μm CMOS, achieves 20-μs startup time with an effective data rate of 2.5 Mb/s while consuming 22 mW.

Keywords

CMOS integrated circuits; frequency synthesizers; low-power electronics; microsensors; modulators; phase locked loops; phase shift keying; power consumption; sigma-delta modulation; voltage-controlled oscillators; wireless sensor networks; 0.25 microns; 2.5 Mbit/s; 22 mW; 6.5 GHz; CMOS; FSK modulator; closed-loop direct VCO modulation; energy efficient modulator; energy-efficient BFSK modulator; fast startup time; frequency channel selection; high data rate; multistage variable loop bandwidth technique; power consumption reduction; wireless sensor applications; wireless sensor network; Bandwidth; Energy consumption; Energy efficiency; Frequency shift keying; Frequency synthesizers; Microsensors; Sensor phenomena and characterization; Transmitters; Voltage-controlled oscillators; Wireless sensor networks;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2004.826314

Filename

1291678