Resistive line circuit

Details Resistive line circuit Resistive line circuit

H - Electricity

04

M

379/63

H04M 19/00 (2006.01)

Patent

CA 1235241

- 11 - RESISTIVE LINE CIRCUIT Abstract Resistive battery feed circuits are normally not used because of lack of power supply noise rejection and attendant crosstalk coupling. In this circuit the opamp and surrounding circuitry insure that power supply and ground noise do not couple into the tip and ring circuits as a metallic signal and improve crosstalk attenuation. In addition, the opamp is used to split the 48 volts supply.

485541

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