Patent ID: 9565024
Date: 2017-02-07
CPC Classifications: H04L,H05B

Claim:
1. A controller for providing amplitude modulated power line coding of an output voltage at an output of the controller, which output voltage is derived from a mains input voltage supply and comprises a periodic waveform, comprising: a transformer having a first winding connected in series between the mains input voltage supply and the output; a sampling and monitoring circuit for sampling and monitoring a voltage of the mains voltage supply before the transformer and/or for sampling and monitoring the output voltage, the sampling and monitoring circuit having a sampling frequency higher than the mains frequency; a switching arrangement for setting the circuit configuration of a second winding of the transformer; a switch controller for controlling the switching arrangement to provide a change in the output voltage in dependence on the monitored voltage or voltages and a target output voltage which comprises a voltage which encodes a binary bit of digital information, such that each half cycle or each full cycle of the output voltage encodes an information bit by means of altering the output voltage.