Chip-to-chip half duplex data communication at 135 Mbps over power-supply rails

Chip-to-chip serial data communication is superposed on power supply over common Vdd/Vss connections through chip, package, and board traces. A power line transceiver demonstrates half duplex spiking communication at 135 Mbps. On-chip power line LC low pass filter attenuates pseudo-differential communication spikes by more than 30 dB, purifying power supply current for internal circuits. Chip-to-chip power line communication invokes supplementary diagnosis functionality to be embedded in SoCs at the time of power connection, with the reduced cost of pin counts.