| 摘要 |
An infrared remote control circuit comprising an infrared sensing element that receives an infrared modulated wave; an amplifying circuit for amplifying a received signal; a band pass filter that extracts a particular frequency from the received signal amplified by the amplifying circuit; a wave detection circuit for detecting an output signal from the band pass filter; and a waveform shaping circuit for shaping the waveform of an output signal from the wave detection circuit, wherein another wave detection circuit is provided between said first wave detection circuit and the waveform shaping circuit as a second wave detection circuit, and wherein the output from the same current mirror circuit is used as a control signal for both BPF and second wave detection circuit. |
