Infrared receiver circuit
Shown as an infrared receiver circuit. The figure shows that the circuit is mainly composed of an infrared remote control signal switching circuit vri and signal amplification, filtering and rectifying integrated circuits TDA4 ()
50B and other parts of. BP104 sense infrared photodiode infrared diode emitting an optical signal, BP104 will optical signal into a current signal, the signal after amplification by VT1 is fed TDA4050B pin, the remote control signal received by the integrated circuit amplifies, filters after shaping and output by the remote control signal feet.