초록 ▼

A transformer system couples a control panel with a power line to support two-way communications over the power line. A first transformer steps-down the power line voltage, supplying power to the control panel. A second transformer and associated capacitors provide a low impedance path at the commun

A transformer system couples a control panel with a power line to support two-way communications over the power line. A first transformer steps-down the power line voltage, supplying power to the control panel. A second transformer and associated capacitors provide a low impedance path at the communication signal frequencies and a high impedance path at the power frequency.

대표청구항 ▼

[ What is claimed is:] [1.] A system for coupling a communication device with a power line, comprising:a first transformer having a primary winding connected with the power line and a secondary winding connected with the communication device;a second transformer having a primary winding connected in

[ What is claimed is:] [1.] A system for coupling a communication device with a power line, comprising:a first transformer having a primary winding connected with the power line and a secondary winding connected with the communication device;a second transformer having a primary winding connected in series with the primary winding of the first transformer and a secondary winding connected in parallel with the secondary winding of the first transformer;a first capacitor connected in series with the secondary winding of the second transformer and in parallel with the secondary winding of the first transformer; anda second capacitor connected in series with the primary winding of the second transformer and in parallel with the primary winding of the first transformer.