A mitral valve therapy device effects the condition of a mitral valve annulus of a heart. In order to solve such a problem, half-bridges each having magneto-resistive elements or transducer elements are excited with different excitation voltages so that the offset voltage is eliminated and the measurement accuracy is improved. A large number of products can be easily manufactured with good size reproducibility. An access control program is configured to determine access rights, the program area is encoded with data mapped in accordance to the layout scheme and for proper use on a computing system, a software application is used to provide access to the data of the program area mapped in accordance with the layout scheme. Further the first bottom pad and the second bottom pad are electrically connected to each other so that the monitoring via may be electrically connected to the second pads by means of the first bottom pad when the top mark and the bottom mark are aligned with each other. This is effected, for example, by switching the cell at predetermined time intervals to an open circuit or reduced output power condition.