Device and method for selectively demodulating ir codes

摘要

A device and method for emitting amplitude-modulated signals, which are fed to an emitting member from a signal source via a driver stage, said amplitude-modulated signals containing a higher frequency carrier and a lower frequency useful signal modulated onto said carrier, said device comprises amplifying means for amplifying the level of the signals received from the signal source to a predetermined level. The device further comprises integrating means for performing integration on the amplified signals so as to remove the higher frequency carrier and signal regenerating means for regenerating the useful signal from the integrated signals and providing the useful signal to said driver stage and emitting member for emission. The high frequency carrier can be removed effectively from the modulated IR signals from the signal source.