Patent ID: 9680633
Date: 2017-06-13
CPC Classifications: G06K,H04B,H04L

Claim:
1. A method for transmitting data by inductive coupling, the method comprising: applying a plurality of bursts of a periodic signal to a tuned inductive antenna circuit, the plurality of bursts of the periodic signal being applied at a rate of a data-carrying signal; producing, in the tuned inductive antenna circuit, an antenna signal, the antenna signal generating a magnetic field; and delimiting an amplitude of each burst of the plurality of bursts of the periodic signal in accordance with an envelope signal, the envelope signal having a rising edge and a falling edge, the delimiting the amplitude of each burst of the plurality of bursts of the periodic signal in accordance with the envelope signal including shaping the falling edge of the envelope signal using one of a digital shaping circuit and an analog shaping circuit, such that a slope of the falling edge of the envelope signal is flattened as compared to a square envelope signal.