Patent ID: 8894297

Claim:
An active optical cable, comprising: a first connector, operative to connect to a first apparatus; a second connector, operative to connect to a second apparatus; and an optical cable, connected between the first connector and the second connector, wherein: the first connector has a first electrical-to-optical and optical-to-electrical conversion processing chip, the first electrical-to-optical and optical-to-electrical conversion processing chip has a first non-inverted transmit input-pin and a first inverted transmit input-pin for coupling to a first non-inverted transmit terminal and a first inverted transmit terminal of the first apparatus, respectively; a connection between the active optical cable and the first apparatus is recognized by charging a first capacitor carried by the first non-inverted transmit terminal and charging a second capacitor carried by the first inverted transmit terminal in a common mode impedance measurement; the first electrical-to-optical and optical-to-electrical conversion processing chip further including a first resistor and a second resistor for the common mode impedance measurement; wherein the first resistor is directly connected between the first non-inverted transmit input-pin and a ground terminal; and wherein the second resistor is directly connected between the first inverted transmit input-pin and the ground terminal.