title: Note: optical receiver system for 152-channel magnetoencephalography.
abstract: An optical receiver system composing 13 serial data restore/synchronizer modules and a single module combiner converted optical 32-bit serial data into 32-bit synchronous parallel data for a computer to acquire 152-channel magnetoencephalography (MEG) signals. A serial data restore/synchronizer module identified 32-bit channel-voltage bits from 48-bit streaming serial data, and then consecutively reproduced 13 times of 32-bit serial data, acting in a synchronous clock. After selecting a single among 13 reproduced data in each module, a module combiner converted it into 32-bit parallel data, which were carried to 32-port digital input board in a computer. When the receiver system together with optical transmitters were applied to 152-channel superconducting quantum interference device sensors, this MEG system maintained a field noise level of 3 fT/√Hz @ 100 Hz at a sample rate of 1 kSample/s per channel.
authors.affiliation: Center for Biosignals, Korea Research Institute of Standards and Science, Daejeon 305-600, South Korea.
authors.forename: Jin-Mok
authors.initials: JM
authors.lastname: Kim
authors.affiliation: Center for Biosignals, Korea Research Institute of Standards and Science, Daejeon 305-600, South Korea.
authors.forename: Hyukchan
authors.initials: H
authors.lastname: Kwon
authors.affiliation: Center for Biosignals, Korea Research Institute of Standards and Science, Daejeon 305-600, South Korea.
authors.forename: Kwon-kyu
authors.initials: KK
authors.lastname: Yu
authors.affiliation: Center for Biosignals, Korea Research Institute of Standards and Science, Daejeon 305-600, South Korea.
authors.forename: Yong-Ho
authors.initials: YH
authors.lastname: Lee
authors.affiliation: Center for Biosignals, Korea Research Institute of Standards and Science, Daejeon 305-600, South Korea.
authors.forename: Kiwoong
authors.initials: K
authors.lastname: Kim
mesh_terms: D003201:Computers; D015225:Magnetoencephalography / Q000295:instrumentation*; D055095:Optics and Photonics / Q000295:instrumentation*