WAKE-UP CIRCUIT FOR AN ELECTRONIC APPARATUS
The invention relates to a wake-up circuit for an electronic apparatus, comprising an input circuit (1) for receiving infrared signals and an amplifier (2) connected to said input circuit (1), the output of which amplifier is connected to a switching stage (6) for switching on the apparatus. To improve the signal/noise ratio the invention provides for the input circuit (1) to comprise a parallel circuit with at least two infrared detectors (2 to 5) connected in series and a parallel oscillatory circuit (11), and for the amplifier to be a band-pass amplifier (2), the output of which is connected to a signal detector to which the switching stage (6) is connected.