Power line communication transmitter with amplifier circuit

摘要

In one embodiment, a transmitter circuit is provided for data transmission from endpoint devices to collector devices over power distribution lines. The transmitter includes an amplifier circuit configured to receive and convert a first data signal to a pulse density modulation (PDM) encoded signal using high frequency pulses that introduce high frequency components. A low-pass filter of the transmitter is configured to filter the high frequency components of the PDM encoded signal to produce a second data signal, which is an amplification of the first data signal. A coupling circuit of the transmitter is configured to communicatively couple the second data signal from the low-pass filter to the power distribution lines. The coupling circuit filters the frequency of the AC and prevents high voltage of the power distribution lines from damaging the transmitter.

主权项

1. A transmitter circuit configured and arranged to communicate over power distribution lines that carry power using alternating current (AC) that operates at a power-line frequency, the transmitter circuit comprising:
an amplifier circuit configured and arranged to:
receive a first data signal in the form of a carrier wave that is modulated to represent data bits; andconvert the first data signal to a pulse density modulation (PDM) encoded signal using high frequency pulses that introduce high frequency components; a low-pass filter configured and arranged to filter the high frequency components of the PDM encoded signal to produce a second data signal, such that the second data signal is an amplification of the first data signal; and a coupling circuit configured and arranged to communicatively couple the second data signal from the low-pass filter to the power distribution lines and to filter the power-line frequency.