A voltage-controlled current source with regulated electrode bias-voltage for safe neural stimulation.
A current source for neural stimulation is presented which converts arbitrary voltage signals to current-controlled signals while regulating the offset-voltage across the stimulation electrodes in order to keep the electrodes in an electrochemical state that allows for injecting a maximum charge. The offset-voltage can either be set to 0V or to a bias-voltage, e.g. of a few 100mV, as it can be advantageous for fully exploiting the charge injection capacity of iridium oxide electrodes.
Schuettler
Martin
M
University of Freiburg, Department of Microsystems Engineering-IMTEK, Laboratory for Biomedical Microtechnology, Georges-Koehler-Allee 102, 79110 Freiburg, Germany. schuettler@imtek.de
Franke
Manfred
M
Krueger
Thilo Bernhard
TB
Stieglitz
Thomas
T
D000818:Animals; D017097:Electric Impedance; D004558:Electric Stimulation / Q000295:instrumentation*; D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D009474:Neurons / Q000502:physiology / Q000528:radiation effects*