Title :
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
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 ¿m CMOS process. Its maximum out power to 50 ¿ 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;
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
DOI :
10.1109/ASICON.2009.5351340
