tailieunhanh - Báo cáo hóa học: " Ultra-Wideband Transceivers for Cochlear Implants Thomas Buchegger"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Ultra-Wideband Transceivers for Cochlear Implants Thomas Buchegger | EURASIP Journal on Applied Signal Processing 2005 18 3069-3075 2005 Thomas Buchegger et al. Ultra-Wideband Transceivers for Cochlear Implants Thomas Buchegger Linz Center of Competence in Mechatronics Altenbergerstrafie 69 4040 Linz Austria Email Gerald OBberger Linz Center of Competence in Mechatronics Altenbergerstrafie 69 4040 Linz Austria Email Alexander Reisenzahn Institute for Microelectronic Johannes Kepler University of Linz Altenbergerstrafie 69 4040 Linz Austria Email Erwin Hochmair Institute for Applied Physics Leopold Franzens University of Innsbruck Technikerstrafie 25 6020 Innsbruck Austria Email Andreas Stelzer Institute for Communications and Information Engineering Johannes Kepler University of Linz Altenbergerstrafie 69 4040 Linz Austria Email Andreas Springer Institute for Communications and Information Engineering Johannes Kepler University of Linz Altenbergerstrafie 69 4040 Linz Austria Email Received 29 April 2004 Revised 21 January 2005 Ultra-wideband UWB radio offers low power consumption low power spectral density high immunity against interference and other benefits not only for consumer electronics but also for medical devices. A cochlear implant CI is an electronic hearing apparatus requiring a wireless link through human tissue. In this paper we propose an UWB link for a data rate of Mbps and a propagation distance up to 500 mm. Transmitters with step recovery diode and transistor pulse generators are proposed. Two types of antennas and their filter characteristics in the UWB spectrum will be discussed. An ultra-low-power back tunnel diode receiver prototype is described and compared with conventional detector receivers. Keywords and phrases broadband antenna cochlear implant detector receiver step recovery diode back tunnel diode ultra-wideband. 1. INTRODUCTION A cochlear implant is an .