Title :
A low-power, high data-rate CMOS ASK transmitter for wireless capsule endoscopy
Author :
Shengxi Diao ; Yuan Gao ; Weida Toh ; Alper, Cem ; Yuanjin Zheng ; Minkyu Je ; Chun-Huat Heng
Author_Institution :
Inst. of Microelectron., A*STAR (Agency for Sci., Technol. & Res.), Singapore, Singapore
Abstract :
This paper presents a low-power, high data-rate amplitude shift keying (ASK) radio frequency transmitter for wireless capsule endoscopy. This transmitter consists of a complementary LC voltage-controlled oscillator to generate the 900 MHz carrier frequency and a switchable driver amplifier (DA) controlled by the digital baseband signal to implement the direct ASK modulation. The modulated signal is amplified by the DA and radiated out by a miniaturized coil antenna. The proposed transmitter is implemented in a commercial 0.18-μm CMOS process with 0.32 mm2 active area. Measurement results show that the peak output power is 1 dBm in the 902-928 MHz ISM band and the average DC power consumption is 7.2 mW at a data rate of 15 Mbps.
Keywords :
CMOS integrated circuits; amplitude shift keying; biomedical electronics; endoscopes; low-power electronics; radio transmitters; ASK modulation; ASK radio frequency transmitter; amplitude shift keying; bit rate 15 Mbit/s; complementary LC voltage-controlled oscillator; digital baseband signal; frequency 900 MHz; frequency 902 MHz to 928 MHz; high data-rate CMOS ASK transmitter; low-power CMOS ASK transmitter; miniaturized coil antenna; power 7.2 mW; size 0.18 micron; switchable driver amplifier; wireless capsule endoscopy; Amplitude shift keying; Endoscopes; Frequency shift keying; Power demand; Transmitters; Voltage-controlled oscillators; Wireless communication; 900MHz ISM band; ASK; High Data Rate; Low Power; Transmitter; Wireless Capsule Endoscopy; Wireless Medical Imaging;
Conference_Titel :
Defense Science Research Conference and Expo (DSR), 2011
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-9276-3
DOI :
10.1109/DSR.2011.6026851
