Patent ID: 8908394

Claim:
Electronic circuitry configured to: at an electrical power supply, sense current pulses generated by a load receiving electrical energy from the electrical power supply, the current pulses being generated by the load using modulated switching of a current being drawn by the load from the power supply; apply a moving average filter to the sensed current pulses generated by the load receiving electrical energy from the electrical power supply to derive a filtered signal; compare the filtered signal to a pair of threshold values to derive a digital bit stream of a message represented by the current pulses generated by the load; provide the digital bit stream to an asynchronous decoder state machine (ADSM) including a register and a bit counter, the ADSM loading the digital bit stream into the register and incrementing the bit counter in accordance with validity testing states; parse the contents of the register using the bit counter to derive digital data of the message; and adjust an operating parameter of the electrical power supply in accordance with the digital data of the message.