The present invention relates to a medical device or implant made at least in part of a high strength, low modulus metal alloy comprising Niobium, Tantalum, and at least one element selected from the group consisting of Zirconium, Tungsten and Molybdenum. The metallic packing has an annular basement. A circuit is electrically coupled with the high side driver and a first node between the high side driver and the low side driver.