DRIVING STAGE

摘要

In a driving stage (1) for driving the two differential amplifier output stages (2, 3) of a subscriber line interface circuit, said driving stage (1) being adapted to generate four driving currents in dependence on, on the one hand, transversal and longitudinal signals IT and IL, respectively, incoming to the driving stage and, on the other hand, a reference current IR, and to supply these driving currents in pairs to the two inputs of the differential amplifier output stages (2, 3), all four of said driving currents being larger than zero.