PURPOSE: To eliminate noise with only one input by re-analyzing an inputted signal for detecting and correcting the noise and inputting it again only with respect to an unrestorable noise. CONSTITUTION: In a noise decision circuit, a pulse value smaller than (the extent of delay)+α is decided to be as a noise because the value of an N-th pulse with Wn is equal to (the pulse width essentially inputted)+(the extent of delay). If Wn is smaller than (the extent of delay)+α, the pulse width Wn of the current turning-on period and a temporary stop pulse width Pn are added to a preceding temporary stop pulse width (Pn-1), so that the noise is ignored because of (the current pulse width Wn)=Pn=0. If Wn is larger than (the extent of delay)+α, Wn is compared with a set maximum value K. When Wn is larger than the set maximum value K, it is judged that an unrestorable waveform generated from a strong light noise has been inputted, and re-input of the pulse waveform is requested.
METHOD OF DETECTING AND CORRECTING PULSE NOISE OF MULTIFUNCTIONAL REMOTE CONTROL TRANSMITTER