A 2.4 GHz wireless transmitter front-end for endoscopy capsule system

Author

Chen, Fan ; Chi, Baoyong ; Wang, ZhiHua

Author_Institution

Inst. of Microelectron., Tsinghua Univ., Beijing, China

fYear

2009

fDate

20-23 Oct. 2009

Firstpage

465

Lastpage

468

Abstract

A 2.4 GHz wireless transmitter front-end for the endoscopy capsule system is presented. The transmitter front-end consists of an IF module (ASK modulator, FSK modulator) and a direct-conversion transmitter RF front-end (double-balanced up-converter, power amplifier). The power amplifier (PA) has digitally programmable output power levels and works at 3.3 V power supply, while other parts work at 1.8 V power supply. The transmitter front-end is implemented in UMC 0.18 Â¿m CMOS process. Its maximum out power to 50 Â¿ load achieves 10 dBm with the data rate of 2 Mbps and dissipates 7.09 mA current from 1.8 V power supply and 25 mA from 3.3 V power supply.

Keywords

CMOS integrated circuits; UHF integrated circuits; amplitude shift keying; biomedical electronics; endoscopes; frequency shift keying; power amplifiers; radio transmitters; ASK modulator; FSK modulator; IF module; UMC CMOS process; bit rate 2 Mbit/s; current 25 mA; current 7.09 mA; direct-conversion transmitter RF front-end; double-balanced up-converter; endoscopy capsule system; frequency 2.4 GHz; power amplifier; resistance 50 ohm; size 0.18 mum; voltage 1.8 V; voltage 3.3 V; wireless transmitter front-end; Amplitude shift keying; CMOS process; Endoscopes; Frequency shift keying; Power amplifiers; Power generation; Power supplies; Radio frequency; Radiofrequency amplifiers; Transmitters; ASK; CMOS; FSK; Transmitter;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC, 2009. ASICON '09. IEEE 8th International Conference on

Conference_Location

Changsha, Hunan

Print_ISBN

978-1-4244-3868-6

Electronic_ISBN

978-1-4244-3870-9

Type

conf

DOI

10.1109/ASICON.2009.5351340

Filename

5351340