Patent ID: 6762917
Filing Date: 2004-07-13
Classification: A61B,H02H

Abstract:
A circuit to control and monitor voltage potential on a human body comprising:an electrode in contact with skin of an operator, a ground fault sensing/relay/current limit stage, and a current-to-voltage converter in a path-to-ground, a filter, an absolute value amplifier, display means, a window detector, a ground fault bistable multivibrator, an astable multivibrator, an activity detector means, and an alarm means; wherein triboelectric current bursts detected by said electrode enter said ground fault sensing/relay/current limit stage, a signal from said ground fault sensing/relay/current limit stage being processed through said current-to-voltage converter, said filter, and said absolute value amplifier, said absolute value amplifier converting bipolar signals into positive unipolar signals, said unipolar signals driving said display means; and wherein a first signal is picked off from said display means to drive said activity detector means, and concurrently, a second signal is picked off from said ground fault sensing/relay/current limit stage, said second signal being processed through said window detector and through said ground fault bistable multivibrator, outputs of said activity detector means and said ground fault bistable multivibrator drive multivibrators which in turn drive said alarm means; such that said alarm means is activated when said circuit does not detect said triboelectric current bursts and when inadvertent contact with a power source occurs.