Patent ID: 7079366

Claim:
A protection circuit for use with a 1394-compliant network of devices, the circuit comprising: a first power source, said first power source supplying current to the protection circuit; a switch connecting the protection circuit to current provided by a second power source while the protection circuit simultaneously receives current from the first power source, said second power source supplied by another device; a transceiver having at least one outbound data line, the at least one data line connected to an electrostatic discharge line; a diode connected between the at least one outbound data line and the electrostatic discharge line; and a sense line, said sense line disposed between the second power source and a sense resistor, said sense resistor connected to said electrostatic discharge line, the sense line and sense resistor operatively configured to direct current to said electrostatic discharge line if voltage from the second power source is detected above a threshold amount.