Patent ID: 8886146

Claim:
An infrared receiver comprising: a decision logic circuit configured to activate or deactivate a squelch and to determine whether a meaningful signal is present; a demodulator adapted to demodulate a received intermediate frequency; a high-pass filter adapted to perform a high-pass filtering of an output of the demodulator; and a rectifier for rectifying an output signal of the high-pass filter; wherein the squelch is deactivated when a meaningful signal is determined; wherein the decision logic circuit is configured to determine whether a signal strength of a received receiver intermediate circuit frequency signal is below a predetermined threshold, and to determine in this case that the signal is not a meaningful signal; wherein the decision logic circuit is configured to determine whether a variance of a carrier frequency of the received receiver intermediate frequency signal is above a predetermined threshold value, and to determine that this signal is not a meaningful signal in this case; wherein the decision logic circuit is configured to determine whether a mean value of an audio amplitude is above a predetermined threshold, and to determine that the signal is not a meaningful signal in this case; and wherein an output signal of the rectifier corresponds to the mean value of the audio amplitude.