Patent ID: 7923856

Claim:
A method for causing, in a power distribution network, a signal allowing data to be transmitted, the method comprising: connecting, between two wires of the network, at least one capacitive load in series with a circuit for modulating the amplitude of a network voltage, the amplitude modulation circuit including at least one Zener diode in parallel with at least one switch; applying to the switch a pulsed data carrying control signal comprising short make pulses, such that the switch is conductive during the duration of each one of the make pulses and short-circuits the Zener diode, thereby modulating the amplitude of the network voltage; and setting the duration of the make pulses to be less than 130 nanoseconds and less than a time constant of the capacitive load to cause an oscillatory response of the network at a resonance frequency thereof in the form of a high-frequency oscillation of the network voltage.