Title :
A 6.5 GHz CMOS FSK modulator for wireless sensor applications
Author :
SeongHwan Cho ; Chandrakasan, A.P.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA
Abstract :
A 6.5 GHz FSK modulator suitable for low power wireless sensor network is presented. The modulator employs closed loop direct VCO modulation to achieve high data rate, variable loop bandwidth technique for fast start-up rates and /spl Sigma/-/spl Delta/ for reduced power consumption in the divider with fine resolution in channel selection. The synthesizer, implemented in 0.25 /spl mu/m CMOS, achieves 20 /spl mu/s start-up time with an effective data rate of 2.5 Mbps while consuming 22 mW.
Keywords :
CMOS integrated circuits; VLSI; distributed sensors; frequency shift keying; low-power electronics; microsensors; mixed analogue-digital integrated circuits; modulators; voltage-controlled oscillators; 0.25 micron; 2.5 Mbit/s; 20 mus; 22 mW; 6.5 GHz; CMOS; FSK modulator; channel selection resolution; closed loop direct VCO modulation; distributed microsensor networks; power consumption; start-up time; variable loop bandwidth technique; wireless sensor applications; Bandwidth; Continuous phase modulation; Energy consumption; Frequency shift keying; Phase locked loops; Phase modulation; Pulse modulation; Synthesizers; Voltage-controlled oscillators; Wireless sensor networks;
Conference_Titel :
VLSI Circuits Digest of Technical Papers, 2002. Symposium on
Conference_Location :
Honolulu, HI, USA
Print_ISBN :
0-7803-7310-3
DOI :
10.1109/VLSIC.2002.1015079
