A rotation speed sensor can be detachably mounted to an outer member of a wheel bearing assembly. The semiconductor wafer is mounted to a carrier. First and second IO electrodes extend from opposing side-surfaces to the undersurface of the dielectric block and are separated from the outer conductor. At least one high voltage buffer stage comprises multiple transistors arranged in a transistor stack that is biased by the first stack of the matched translation stack, and is connected to receive an input supplied by the second stack of the matched translation stack. The ascending aorta may be occluded and cardioplegic fluid delivered by means of an occlusion balloon attached to the distal end of an elongated catheter positioned transluminally in the aorta from a femoral, subclavian, or other appropriate peripheral artery.