Patent ID: 6134323
Filing Date: 2000-10-17
Classification: H04M

Abstract:
A telecommunications system comprising a supply circuit for a telecommunications line comprising a first and a second wire, said supply circuit comprising a first electronic impedance circuit including a first transistor and a second electronic impedance circuit including a second transistor, the electronic impedance circuits being coupled between a first voltage reference terminal and the first wire, and between a second voltage reference terminal and the second wire, respectively, the supply circuit comprising a first electronic impedance multiplying circuit including a third transistor and a second electronic impedance multiplying circuit including a fourth transistor, a main current path of the first transistor being connected in a first series arrangement with a main current path of the third transistor between the first reference voltage terminal and the first wire, and a main current path of the second transistor being connected in a second series arrangement with a main current path of the fourth transistor between the second reference voltage terminal and the second wire, said first and second series arrangements only including main electrodes of said first and third transistors, and of said second and fourth transistors, respectively.