Circuit design peculiarities of photoreceivers of multimode fiber-optic communication lines rated for data transmission of up to 200 MBit/s

Fast-acting systems and devices, using fiber-optic lines as transmission medium, the application of low-noise converters designed for transformation of optic signals into electric ones compatible with digital integrated circuits is of great importance. One of the possible methods of such converter construction is suggested in the given paper. The scheme of multimode fiber-optic lines receiver designed for data transmission rate of 125-140 MBit/s at the wave length of optic radiation of lambda = 1,3 mum has been developed. The parameters of the receiver meet the requirements of closed-loop local computing nets where fiber-optic lines (FDDI standard) are used as transmission medium. The receiver was developed on the base of bipolar transistors and p-i-n photodiode.