Circuit for maintaining hybrid cancellation of signals in a...

Details Circuit for maintaining hybrid cancellation of signals in a... Circuit for maintaining hybrid cancellation of signals in a...

H - Electricity

04

M

379/66

H04M 7/00 (2006.01) H04M 3/56 (2006.01)

Patent

CA 1240089

ABSTRACT A circuit for maintaining hybrid cancellation of signals carried by a signal bus of a communication system, in response to variations in the number of hybrid circuits connected to the bus. One or more microprocessor control switches are utilized for selectively connecting one or more balancing load impedances to the bus in response to variations in the number of hybrid circuits connected thereto, such that a constant total load impedance is maintained on the bus. Also, circuitry is associated with each of the hybrid circuits for effecting hybrid cancellation of signals on the bus relative to the constant total load impedance. The circuit is of simple design and construction, occupying every little circuit board area and being of very low cost.

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