Wide-Band AC-Coupled Current Source for Electrical Impedance Tomography

Authors:Bragós, R. Rosell, J. and Riu, P.

Journal:Proceedings of the CAIT p 46-47 Date : September 93 Country of Publication SP

Conf. title:CAIT 1993 Conf. date: September 23-25, 1993, Conf. Loc.: Barcelona, Spain

Abstract: Multifrequency EIT needs high-quality controlled current sources, able of maintaining at optimum a 0.1% accuracy in a wide bandwidth (10 kHz to 1 MHz). In the last four years, some implementations based on current-sensing at the supply terminal of an amplifier have been published. The amplifier is usually an open-loop AB class buffer or an OpAmp-based voltage follower...