Patent ID: 7266301
Filing Date: 2007-09-04
Classification: G08C,H04B

Abstract:
1. A repeater unit comprising: at least one receiver module responsive to an infrared signal; and a controller unit adapted to determine whether a signal based on the infrared signal corresponds to one of a plurality of remote control signals, wherein the at least one receiver module comprises a first receiver module, tuned to a first carrier frequency, that receives the infrared signal and is configured to generate a first signal based on the infrared signal, and a second receiver module, tuned to a second carrier frequency, that receives the infrared signal and is configured to generate a second signal based on the infrared input signal, wherein the controller unit: determines if the first signal based on the infrared signal is a valid remote control signal by determining if the first signal corresponds to one of the remote control signals, or determines if the second signal based on the infrared signal is a valid remote control signal by determining if the second signal corresponds to one of the remote control signals; and generates a signal that corresponds to one of the remote control signals, if the controller unit determines that either the first signal or the second signal is a valid remote control signal, by adding either a fixed carrier frequency, or a multi frequency signal to either the first signal or the second signal, wherein the controller unit determines if the first signal corresponds to one of the remote control signals by measuring a pulse width of the first signal, and determining if the pulse width of the first signal is greater or less than a predetermined duration that corresponds to a duration of a carrier of one of the remote control signals, wherein the controller determines that the second signal corresponds to one of the remote control signals by measuring a pulse width of the second signal, and determining if the pulse width of the second signal is greater or less than a predetermined duration that corresponds to a duration of a carrier of one of the remote control signals, and wherein the controller unit determines that either the first signal or the second signal corresponds to one of the remote control signals, even though the pulse width of the first output signal or the second signal is less than the predetermined duration, if the first signal and the second signal are simultaneously active.