Monolithisch integrierbarer automatischer Leitungsentzerrer für hochbitratige Übertragungssysteme

The optical 2.488-Gbit/s transmit units of the Synchronous Digital Hierarchy (SDH) are able to assemble 16 bitstreams of 155.52 Mbit/s (STM1) to one STM16 bitstream. Among other things each of the SIM1 interfaces has an automatic line equalizer. Because of space exploitation, power dissipation and circuit expenditure, its is advantageous to have an integrated circuit at this point. The operation principle of such a line equalizer is given suitable for monolithic integration and for the application at 140 Mbit/s.