Lecture
This lecture explains the operation of an inductive sensor, which involves a tag with a chip storing information and an emitter producing an electromagnetic field. The tag's chip, typically a CMOS chip, contains a memory storing data, such as an identification code. The lecture also covers RFID systems, where multiple bits of information can be stored without the need for complex electronics. Additionally, it discusses a more advanced system using a piezoelectric material to convert electromagnetic waves into mechanical waves, allowing for rich information encoding based on the position of reflectors on the tag's surface.