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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2006, Vol. 7 Issue (6 ): 19-    DOI: 10.1631/jzus.2006.A1056
    
A wideband frequency-shift keying demodulator for wireless neural stimulation microsystems
DONG Mian, ZHANG Chun, MAI Song-ping, WANG Zhi-hua, LI Dong-mei
Department of Electronic Engineering, Tsinghua University, Beijing 100084, China; Institute of Microelectronics, Tsinghua University, Beijing 100084, China
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Abstract  This paper presents a wideband frequency-shift keying (FSK) demodulator suitable for a digital data transmission chain of wireless neural stimulation microsystems such as cochlear implants and retinal prostheses. The demodulator circuit derives a constant frequency clock directly from an FSK carrier, and uses this clock to sample the data bits. The circuit occupies 0.03 mm2 using a 0.6 μm, 2M/2P, standard CMOS process, and consumes 0.25 mW at 5 V. This circuit was experimentally tested at transmission speed of up to 2.5 Mbps while receiving a 5~10 MHz FSK carrier signal in a cochlear implant system.

Key words： Biomedical implants      CMOS      Demodulator      Frequency-shift keying (FSK)      Cochlear implant     
Received: 12 September 2005     
CLC:  TN76  
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DONG Mian
ZHANG Chun
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Cite this article:

DONG Mian, ZHANG Chun, MAI Song-ping, WANG Zhi-hua, LI Dong-mei. A wideband frequency-shift keying demodulator for wireless neural stimulation microsystems. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(6 ): 19-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2006.A1056     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2006/V7/I6 /19

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