title: Implementation of a miniature sized, battery powered electrophysiological signal-generator for testing multi-channel recording equipments.
abstract: Testing electrophysiological recording equipments is an important task in multi-channel extracellular in vivo electrophysiology. In this paper, a miniature, battery powered multi-channel electrophysiological signal-generator (ESG) is described that was designed for this purpose. The device is based on a Xilinx CPLD (Complex Programmable Logic Device) and it is powered by a 3V lithium coin battery. It is a useful tool for calibration and testing the performance, quality and parameters of the recording equipments used for acquiring EEG, field potentials, ECG, EMG, and multiple unit activity. The device is ideally suited to identify instances when errors interfere with the proper recording, and repair of wiring or service of the equipment is needed. Two versions of the device are described; one is for 16 (ESG16), and another is for 32 channels (ESG32). Both versions provide amplitude and time calibration, as well as cross-talk and CMRR (common mode rejection ratio) testing for the recording equipment.
authors.affiliation: Institute of Electronics, University of Pécs, Faculty of Engineering, Boszorkány út 2, H-7624 Pécs, Hungary.
authors.forename: Kálmán
authors.initials: K
authors.lastname: Máthé
authors.forename: Attila
authors.initials: A
authors.lastname: Tóth
authors.forename: Zoltán
authors.initials: Z
authors.lastname: Petykó
authors.forename: Imre
authors.initials: I
authors.lastname: Szabó
authors.forename: András
authors.initials: A
authors.lastname: Czurkó
mesh_terms: D004594:Electrophysiology / Q000295:instrumentation* / Q000592:standards*; D004867:Equipment Design