Title :
A high voltage stimulator for small electrode electrocutaneous stimulation
Author :
Poletto, Chris J. ; Van Doren, Clayton
Author_Institution :
Dept. of Biomed. Eng., Case Western Reserve Univ., Cleveland, OH, USA
fDate :
30 Oct-2 Nov 1997
Abstract :
A high voltage stimulator has been designed to allow transcutaneous stimulation of tactile fibers of the fingertip. The output stage is based upon an improved Howland current pump topology, modified to allow high load impedances and small currents. The current output accuracy is better than 15% for 1 to 10 mA for 30 μsec pulses. The rise time for square pulses is less than 2 μsec. Common mode latch-up power supply problems are discussed
Keywords :
biomedical electrodes; electric current control; feedback amplifiers; force feedback; haptic interfaces; neuromuscular stimulation; operational amplifiers; prosthetic power supplies; sensory aids; skin; telerobotics; virtual reality; 1 to 10 mA; 2 mus; common mode latch-up power supply problems; current output accuracy; dynamic range; feedback; fingertip tactile fibers; high load impedances; high voltage stimulator; improved Howland current pump topology; master op amp; pain; rise time for square pulses; sensory substitution systems; slave op amp; small currents control; small electrode electrocutaneous stimulation; telepresence; telerobotic manipulator; virtual reality; voltage to current conversion; Biomedical electrodes; Biomedical engineering; Circuit topology; Feedback; Impedance; Operational amplifiers; Performance analysis; Pulsed power supplies; Resistors; Voltage control;
Conference_Titel :
Engineering in Medicine and Biology Society, 1997. Proceedings of the 19th Annual International Conference of the IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-4262-3
DOI :
10.1109/IEMBS.1997.756809
