Analog delay line artifact rejector for evoked potential studies.
A true artifact rejector which utilizes a bucketbrigade delay line is described. The delay line enables scanning of all the data in the analysis period prior to its inclusion in the average. The device is small in size, independent of the averager, and the total cost of components is under $100. This artifact rejector is compatible with any averager. Artifact rejection can be according to excessive amplitude, as described in this version, or according to externally applied signals. In addition, by a minor change in the interference detector module, rejection could be according to other criteria, such as frequency contents. The utility of the device is demonstrated on records of auditory brain stem evoked potentials.
D000703:Analog-Digital Conversion; D001933:Brain Stem / Q000502:physiology*; D004569:Electroencephalography / Q000295:instrumentation*; D005072:Evoked Potentials, Auditory; D009622:Noise