Digital two-to-four wire converter for full duplex signals

H - Electricity – 04 – M

Patent

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379/67

H04M 7/04 (2006.01) H04B 1/58 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 1168777

Abstract of the Disclosure A digital electronic hybrid circuit for a telephone line circuit is described wherein the two-to-four wire conversion function is provided with an improved synthe- sized automatic impedance match between the telephone subscriber line and the digital central office. More particularly, an impedance at the input to the line circuit is simulated without the use of discrete components and which closely matches the subscriber line impedance. The circuit digitally separates the full duplex signals on a two-wire transmission path to a pair of digital signals. JPM:rr

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