Infrared receiver on transistors. Scheme, description

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Infrared receiver on transistors. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / infrared technology

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Schematic diagram of the receiver of pulsed IR signals is shown in fig. 35. Its output can be connected to the input of a digital CMOS chip directly. If the photohead must be removed from the digital analyzer, and the capacitance of the cable connecting them exceeds 100 ... 200 pF, the photoamplifier will need to be supplemented with a buffer amplifier. Such, for example, as in Fig. 36, a (amplifier-inverter) or in fig. 36b. The capacitive load of a photo head with such an output amplifier can be increased to 0,01 uF.

Rice. 35. IR transistor receiver (click to enlarge)

Infrared receiver on transistors
Rice. 36. Power amplifiers in CMOS technology

Table 7
Upit,B Ipot, mA
4,5 0,30
5,0 0,30
6,0 0,32
7,0 0,34
8,0 0,35
9,0 0,37

Photodiode FD263-01 can be replaced with FD320. And if you have a good optical hub - almost any of those listed in Appendix 2.

The IR receiver remains operational when the power supply voltage Upit changes over a wide range. The dependence of the current consumed by it Ipotr on the supply voltage is shown in Table 7.

Publication: cxem.net

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