UCL  IRIS
Institutional Research Information Service
UCL Logo
Please report any queries concerning the funding data grouped in the sections named "Externally Awarded" or "Internally Disbursed" (shown on the profile page) to your Research Finance Administrator. Your can find your Research Finance Administrator at http://www.ucl.ac.uk/finance/research/post_award/post_award_contacts.php by entering your department
Please report any queries concerning the student data shown on the profile page to:

Email: portico-services@ucl.ac.uk

Help Desk: http://www.ucl.ac.uk/ras/portico/helpdesk
Publication Detail
An adaptive ENG amplifier for tripolar cuff electrodes
Abstract
Electroneurogram (ENG) recording from tripolar cuff electrodes is affected by interference signals mostly generated by muscles nearby. Interference reduction may be achieved by suitably designed amplifiers such as the true-tripole and quasi-tripole systems. However, in practice their performance is severely degraded by cuff imbalance, resulting in very low output signal-to-interference ratios. Although some improvement may be offered by post filtering, this considerably increases complexity, size and power dissipation, rendering the approach unsuitable for the development of a high performance ENG recording system which is fully implantable. This paper describes an integrated, fully implantable, adaptive ENG amplifier developed to automatically compensate for cuff imbalance, and thus significantly improve the quality of the recorded ENG. Measured results showed that the adaptive ENG amplifier has a yield of 100%, a cuff imbalance correction range of more than ±40%, and an output signal-to-interference ratio of about 2/1 (6 dB) even for ±40% imbalance. The latter should be compared with an input signal-to-interference ratio of 1/500 (-54 dB). The circuit was fabricated in 0.8 m BiCMOS technology, has a core area of 0.68 mm2, and dissipates 7.2 mW from ±2.5 V power supplies. The adaptive ENG amplifier advances the state-of-the-art in implantable tripolar cuff electrode recording techniques.
Publication data is maintained in RPS. Visit https://rps.ucl.ac.uk
 More search options
UCL Researchers
Author
Dept of Electronic & Electrical Eng
University College London - Gower Street - London - WC1E 6BT Tel:+44 (0)20 7679 2000

© UCL 1999–2011

Search by