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Institute for Measurement Technology
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Master Theses.

Low-cost communication over low-voltage power supply lines

Oliver Oberleitner

In this thesis a cost-effective data transmission system with a quiescent current of less than 2µ is presented. The system uses a power supply line with an operating voltage of less than 15V as communication channel and a master-slave configuration to transmit data over copper wires up to a cable length of several meters in half-duplex mode. The system is designed for self-powered or battery-powered devices where low electrical power consumption is vital for a long battery lifetime. In order to achieve the design requirements a mathematical model of the circuit is presented and used to determine reasonable values for the electronic components.

Keywords: Sendrequest, quiescent current, Master, Slave

The circulation of the project work is restricted from 22.02.2017 for a period of 5 years.

February 16th, 2017

Figure 1: Assembly of the Demonstrator.