Title :
A lMb/s, −75dBm sensitive fully integrated body channel transceiver for a low energy compact wearable healthcare sensor
Author :
Yan, Long ; Bae, Joonsung ; Yoo, Hoi-Jun
Author_Institution :
Dept. of Electr. Eng., KAIST, Daejeon, South Korea
Abstract :
A 1Mb/s fully integrated FSK transceiver using human body as a transmission medium is presented for a low energy compact wearable healthcare sensor. 20-40MHz, which is divided into 4 sub-channels, is utilized for body channel communication (BCC) to tolerate body induced interferences. FSK transmitter (TX) adopts 8b digitally controlled LC oscillator for replacing power consuming PLLs to achieve fast switching radio within 1μβ. The direct conversion receiver (RX) guarantees the operation at -75dBm unstable FSK spectrum received through body, and provides BER less than 10-6 without the help of bulky external X-tal oscillator. The proposed transceiver of 2.1mm × 3.3mm was fabricated in 0.18μm CMOS process, and dissipates 2.3mW/3.1mW in TX and RX, respectively.
Keywords :
biomedical equipment; biosensors; body sensor networks; frequency shift keying; phase locked loops; transceivers; 0.18μm CMOS process; FSK transceiver; LC oscillator; bit rate 1 Mbit/s; body channel communication; direct conversion receiver; frequency 20 MHz to 40 MHz; fully integrated body channel transceiver; human body transmission medium; low energy compact wearable healthcare sensor; noise figure -75 dB; power consuming PLL; Biomedical monitoring; Frequency control; Frequency shift keying; Mixers; Oscillators; Transceivers;
Conference_Titel :
Solid State Circuits Conference (A-SSCC), 2010 IEEE Asian
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-8300-6
DOI :
10.1109/ASSCC.2010.5716598
