GEAR FOR MATCHED CONNECTION OF TWO-WIRE AND FOUR-WIRE PATHS Russian patent published in 1994 - IPC

FIELD: digital telephone sets. SUBSTANCE: gear for matched connection of two- and four-wire paths has transformer 3 with windings 1, 2 and 6, wires 4 and 5 of two-wire path, first, second and third resistors 7, 8 and 9, first, second, third and fourth diodes 10, 11, 12 and 13. Gear is supplemented with transistors 17 and 18, capacitors 27-32, stabilizer diodes 33 and 34 and supplementary resistors 19-26 for matched connection of two- and four-wire paths which are placed together with windings of transformer and main resistors and diodes between wires of two-wire path and input and output wires of four-wire path. EFFECT: simplified design, enhanced operational reliability. 1 dwg