DEVICE FOR RECEIVING, AMPLIFYING, PREPROCESSING SIGNALS OF OPTICAL DATA TRANSMISSION CHANNELS IN THE INFRARED RANGE Russian patent published in 2021 - IPC H03K3/02 H04B10/69 

FIELD: optical instrumentation.

SUBSTANCE: invention relates to the field of optical instrumentation, in particular to means for processing signals from photodetectors. A device for receiving, amplifying, preprocessing signals from optical data transmission channels in the infrared (IR) range contains an IR photodiode switched on in the photodiode mode and connected to a signal processing unit, a signal processing unit, a switch and a stereo audio amplifier. The signal processing unit contains an operational amplifier (OA) with a resistor in the negative feedback circuit, three capacitors and seven resistors, two signal processing channels connected to the output of the OA, consisting of series-connected high-pass filters (HPF) and low-pass filters (LPF) (in this case one channel performs amplitude demodulation of the signal and contains an amplitude demodulator with a voltage stabilizer connected between the HPF and LPF). The outputs of the signal processing channels are the outputs of the signal processing unit and are connected to the inputs of the switch, the output of which is connected to the first input of the stereo audio amplifier (SA).

EFFECT: improving the detection efficiency of optical data transmission channels.

3 cl, 1 dwg