Inductive communication system with improved noise immunity by using a transmitter with less complexity

摘要

The present invention relates to a modulation device of the communication system. Modulator comprises a spread spectrum coder. Pulse code modulation device comprises a pulse code modulator having a signal input port connectable to a signal output port of the spread spectrum coder. By using the spread spectrum system that have changed in combination with pulse code modulation, the modulation apparatus performs modulation and coding schemes and error-free tough. Communication system has a coding system using the transmitter very simple modulation and strong low data rate, the noise. As a consequence, it becomes a transmitter a very simple circuit, which reduces the price and the size of the transmitter.