Digital data transmitter for fixed information

摘要

A digital data transmitter (20) is proposed which provides the signal voltage required for FSK or PSK transmission, at low technical cost. The data transmitter, according to the invention comprises a clock generator (22), an addressing mechanism (23), an electronic memory (21) connected to the addressing mechanism and an evaluation network (24) connected to the memory output. The binary values of the information bits (L1, H1) are stored in the memory in such a way that the evaluation network emits a modulation signal which has discrete voltage steps. <IMAGE>