INPUT CONVERTER FOR AN EEG MONITORING SYSTEM, SIGNAL CONVERSION METHOD AND MONITORING SYSTEM

In order to minimize noise and current consumption in an EEG monitoring system (40) which can be continuously carried by a person being monitored, an input converter (44) for an EEG monitoring system is devised. The analog-to-digital converter of the input converter has an input stage, an output sta...

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Bibliographic Details
Main Authors KILSGAARD, SOREN, KNUDSEN, NIELS, OLE
Format Patent
LanguageEnglish
Published 28.11.2011
Subjects
BASIC ELECTRONIC CIRCUITRY
CODE CONVERSION IN GENERAL
CODING
DEAF-AID SETS
DECODING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS
PUBLIC ADDRESS SYSTEMS
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Summary:In order to minimize noise and current consumption in an EEG monitoring system (40) which can be continuously carried by a person being monitored, an input converter (44) for an EEG monitoring system is devised. The analog-to-digital converter of the input converter has an input stage, an output stage, and a feedback loop, and the input stage comprises an amplifier (QA) and an integrator (RLF). A voltage transformer (IT) is placed in the input converter upstream of input stage. The transformation ratio of the voltage transformer (IT) has a transformation ratio such that it provides an output voltage larger than the input voltage, thereby multiplying the signal voltage for the input stage by a fixed factor. The voltage transformer (IT) is a switched-capacitor voltage transformer having at least two capacitors (Cx, Cy, Cz) The invention further provides a method of converting an analog signal, and an EEG monitoring system comprising the input converter (44).
Bibliography:Application Number: SG20110067287