DocumentCode
1267500
Title
Battery-less ASK/O-QPSK transmitter for medical implants
Author
Chen, Hung-Chuan ; Lee, Woo-Kyung
Author_Institution
Dept. of Electr. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
Volume
48
Issue
17
fYear
2012
Firstpage
1036
Lastpage
1038
Abstract
A battery-less ASK/O-QPSK transmitter is presented using 0.18 μm CMOS technology for medical implants. The 432 MHz transmitter uses an identical signal source of 54 MHz for injection-locked frequency synthesis and RF powering to accomplish battery-less operation. The transmitter exhibits an output power of -15.1 dBm. The phase noises of -112.6 and -116.1 dBc/Hz are achieved at offsets of 100 and 1 MHz from 432 MHz, respectively. The maximum data rates are 50 kbit/s and 2.5 Mbit/s for ASK and O-QPSK modulation schemes, respectively.
Keywords
CMOS integrated circuits; amplitude shift keying; biomedical electronics; phase noise; prosthetics; quadrature phase shift keying; signal sources; transmitters; CMOS technology; RF powering; batteryless ASK/O-QPSK transmitter; bit rate 2.5 Mbit/s; bit rate 50 kbit/s; frequency 1 MHz to 432 MHz; identical signal source; injection-locked frequency synthesis; medical implants; phase noises; size 0.18 mum;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el.2012.1172
Filename
6272436
Link To Document