A Continuous Multichannel Automatic Curve Reader

Author

Barlow, John S. ; Diperna, Richard A.

Author_Institution

Neurophysiology Lab. of the Neurology Service, Massachusetts General Hospital, Boston, Mass.; the Dept. of Neurology, Harvard Medical School, Boston, Mass.; and the Dept. of Electrical Engineering, Massachusetts Institute of Technology, Cambridge, Mass.

Issue

1

fYear

1968

Firstpage

46

Lastpage

53

Abstract

Details of construction and characteristics of performance for a multichannel analog curve reader are described. This system is intended primarily for automatic transcription of bioelectric-data recordings such as electroencephalograms, and employs the principle of phase-modulated analog sampling. It utilizes electro-encephalographs, polygraphs, or similar devices through which the original recordings are rerun for transcription; the usual ink-writing pens of these devices are replaced by self-contained photoelectric scanning pens. The system is versatile in its operation, permitting either the slow-speed exact duplication of ink-written traces or similar data, or high-speed transcriptions (within the limits of the sampling theorem) for computer analysis, either directly, or via the intermediary of magnetic-tape recordings. The number of channels is optional and readily expandable; an 8-channel system has been constructed.

Keywords

Analog computers; Bioelectric phenomena; Electroencephalography; Frequency; Ink; Magnetic recording; Nervous system; Pulse circuits; Pulse shaping methods; Sampling methods;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/TBME.1968.4502531

Filename

4502531