A cutting tool comprising a body, a cutting edge on at least one part of said body and a plasma deposited carbon coating layer provided on said cutting edge that is substantially free of macro-particles. The non-isolated conversion module is implemented based on a redundant structure and has a first power conversion loop, a second power conversion loop, and an energy storage element. The main passage is connected between the main compresses air reservoir and the bottom cylinder chamber. Then, a source region is defined within a first area of the semiconductor region, the first region being located over an insulating layer.