| 摘要 |
In a method for transferring a binary code consisting of a plurality of bits from a code carrier to a code receiver, a periodic signal is transferred from the code receiver to the code carrier. In each period of the periodic signal supplied, one bit in the code is transferred from the code carrier to the code receiver in that the signal supplied to the code carrier is given an increase depending on the value of said bit. The signal increase is detected in the code receiver. A code carrier for implementing the method has a memory (M) which is sequentially addressable by the periodic signal supplied from the code receiver and has a number of bit cells corresponding to the number of bits in the code, and a pulse generator (P1, P2, T1) connected to an output of the memory and so controlled as to give the periodic signal in each period thereof an increase depending on the bit value on the output of the memory. |
