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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.6 P.1056-1060


A wideband frequency-shift keying demodulator for wireless neural stimulation microsystems

Author(s):  DONG Mian, ZHANG Chun, MAI Song-ping, WANG Zhi-hua, LI Dong-mei

Affiliation(s):  Department of Electronic Engineering, Tsinghua University, Beijing 100084, China; more

Corresponding email(s):   dongmian99@mails.tsinghua.edu.cn

Key Words:  Biomedical implants, CMOS, Demodulator, Frequency-shift keying (FSK), Cochlear implant

DONG Mian, ZHANG Chun, MAI Song-ping, WANG Zhi-hua, LI Dong-mei. A wideband frequency-shift keying demodulator for wireless neural stimulation microsystems[J]. Journal of Zhejiang University Science A, 2006, 7(6): 1056-1060.

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publisher="Zhejiang University Press & Springer",

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A1 - DONG Mian
A1 - ZHANG Chun
A1 - MAI Song-ping
A1 - WANG Zhi-hua
A1 - LI Dong-mei
J0 - Journal of Zhejiang University Science A
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2006.A1056

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.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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