Patent ID: 9705562
Date: 2017-07-11
CPC Classifications: H04B

Claim:
1. An alternating current power line communication interface device comprising: communication interface circuitry including: a first signal source configured to generate a first data encoded signal; first signal conditioning circuitry connected to the first signal source for modifying the first data encoded signal; a first transformer connected to the first signal conditioning circuitry and configured to receive and transform an output from the first signal conditioning circuitry at a primary winding, the primary winding having a secondary to primary winding ratio that is greater than one; second signal conditioning circuitry connected to the first transformer for modifying an output from the first transformer; a second transformer connected in series with the second signal conditioning circuitry to receive and transform an output from the second signal conditioning circuitry at a primary winding of the second transformer, the second transformer including a secondary winding electromagnetically coupled to the primary winding to provide an output signal, the second transformer having a secondary-to-primary winding ratio that is greater than one; the first transformer and the second transformer configured to change a voltage of the first data encoded signal in a stepwise fashion; and signal coupling circuitry coupled to the secondary winding of the second transformer, the signal coupling circuitry configured to couple the output signal to the alternating current power line.