An inter-digital bulk acoustic resonator including a resonating structure, one or more input electrodes, one or more output electrodes, a substrate, and a supporting structure disposed on the substrate is provided. The method may include positioning a medical device adjacent a region of tissue having two tissue portions. Once the clock DCD signal is calibrated, a data DCD signal is generated and calibrated based upon results obtained from a filtering process of the data DCD signal. The connector preferably includes a pair of laterally spaced apart and parallel lower portions having lower ends secured to the tool head, a central portion connecting the lower portions, and an upper portion centrally connected to the central portion and the handle. The invention further relates to such a commutated motor, particularly in a direct current design, and to an anti-lock breaking device. 1R1 to R4 are monovalent hydrocarbon groups, n is an integer of 1-2,000, X has a structure of the formula: 2and R5 is an acrylic functional organic group of the formula: 3wherein R is H or methyl and R is a divalent hydrocarbon group.