RF identification system for use in toys

摘要: A method and apparatus which allows one toy to identify a plurality of objects is provided. The system relies on the inductive coupling with tank circuit contained within object be identified therefore does not require physical contact between object. sensing includes variable frequency RF oscillator an air wound coil radiate magnetic flux couples surrounding coil. resonant inductively coupled serves as signature for In approach, varied over range frequencies while current drawn by monitored. draw provides means identifying since will at minimum when substantially corresponds circuit. another function broken up into oscillation generating step step. During step, monitors ringing emitted object, due after stimulus has been removed.