Implementation of a galvanically isolated low-noise power supply board for multi-channel headstage preamplifiers

• Published in: Journal of neuroscience methods Vol. 171; no. 1; pp. 13 - 18
• Main Authors: Tóth, Attila, Máthé, Kálmán, Petykó, Zoltán, Szabó, Imre, Czurkó, András
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 15-06-2008
• Subjects: Amplifiers, Electronic; Analog-Digital Conversion; Electric Power Supplies; Electrophysiology - instrumentation; Ensemble; Equipment Design; Extracellular; Multi-electrode; Multi-site recording; Multiple single unit; Rat; Tetrode; Rat; Multiple single unit; Ensemble; Multi-site recording; Tetrode; Multi-electrode; Extracellular
• ISSN: 0165-0270; 1872-678X
• DOI: 10.1016/j.jneumeth.2008.01.029

Custom made multi-channel headstage preamplifiers are traditionally powered by battery. By the use of an isolated unregulated DC/DC converter integrated circuit (DCP010512B from Texas Instruments Inc., TX, USA), here we describe the implementation of a galvanically isolated low-noise power supply board for multi-channel headstage preamplifiers. The implemented galvanically isolated power supply board provides the same quality noise free recording as the battery power supply. The non-isolated part of the power supply board is powered by standard 230
V AC/6
V DC wall mount adapter or USB cable. The described galvanically isolated power supply board can replace the batteries in preamplifier power supplies without any deterioration of the quality of recordings.