Information transmission system for transportable data cards - has card with monolithic integrated semiconductor chip coupled to read/write unit with control circuit for data checking

摘要

The information transmission system has a read/write unit (1) and a transportable data card (2). The data card has a monolithic integrated semiconductor chip (HL) containing a control stage (PU2) and a receiver (1Fb). The read/write unit has a control unit (PU1) to check the data of the card. Information (IN1) is transmitted (IFn) to the card. Card information is transmitted (IFy) and is received (IF2) for input to a comparator stage (COMP) built into the control unit of the read/write unit. USE/ADVANTAGE - Improved data handling.