Duplex signaling circuit

Details Duplex signaling circuit Duplex signaling circuit

H - Electricity

04

B

333/6

H04B 3/03 (2006.01) H04L 5/14 (2006.01) H04L 5/20 (2006.01) H04L 25/22 (2006.01) H04Q 1/38 (2006.01)

Patent

CA 1205530

_ 30 - DUPLEX SIGNALING CIRCUIT Abstract A duplex signaling circuit for signaling with respect to a line circuit includes a resistance bridge hybrid having a modified resistance makeup to reduce power consumption and improve longitudinal current immunity without altering conjugacy between signaling transmission and receiving connections to the bridge. An electronic relay emulator, which is responsive to bridge hybrid output signals representing received line circuit signals, provides relative immunity to noise and to pulse splitting for thereby relieving a hybrid balancing impedance capacitance of those functions so that a compromise capacitor value can be selected for balancing a relatively wide range of signaling line circuits. A user-stepped, successive approximation, adjustment process for the balancing impedance is implemented in the signaling circuit.

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