BALANCED CURRENT MULTIPLIER CIRCUIT FOR A SUBSCRIBER LOOP INTERFACE CIRCUIT

摘要

A balanced multiplier circuit for a subscriber loop interface (SLIC)(100) which provides both loop current to a two-wire bidirectional subscriber loop (12, 14) and suppression of longitudinal signals generated at the two-wire loop input to the SLIC while maintaining the midpoint load voltage at half the available power supply voltage applied to the SLIC.