Switch bypass circuit for power line communication systems

Claim 2

Apparatus for coupling a power line communication signal around a switch, comprising: a first transformer having a primary winding and a secondary winding; a first inductor connected electrically in parallel with said primary winding of said first transformer, a first terminus of said primary winding of said first transformer being connected to ground; a first capacitor being connected electrically in series between a second terminus of said primary winding of said first transformer and said first inductor, a first side of a power line switch being electrically connectable to said first capacitor between said first capacitor and said first inductor; a second transformer having a primary winding and a secondary winding; a second inductor connected electrically in parallel with said primary winding of said second transformer, a first terminus of said primary winding of said second transformer being connected to ground; a second capacitor being connected electrically in series between a second terminus of said primary winding of said transformer and said second inductor, a second side of a power line switch being electrically connectable to said second capacitor between said second capacitor and said second inductor; a first terminus of said secondary winding of said first transformer being connected in electrical communication with a first terminus of said secondary winding of said second transformer; and a second terminus of said secondary winding of said first transformer being connected in electrical communication with a second terminus of said secondary winding of said second transformer; a transceiver connected in electrical communication with said first terminus and said second terminus of said secondary winding of said first transformer.

Claim 3

The apparatus of claim 1, wherein: said secondary winding of said first transformer has three or more termini.

Claim 4

The apparatus of claim 1, wherein: said secondary winding of said second transformer has three or more termini.

Claim 5

A coupling device for bypassing a switch in a power line distribution circuit, comprising: a first transformer having a primary winding and a secondary winding; a first inductor connected electrically in parallel with said primary winding of said first transformer, a first termination of said primary winding of said first transformer being connected to ground; a first capacitor being connected electrically in series between a second termination of said primary winding of said first transformer and said first inductor, a first side of a power line switch being electrically connectable to said first capacitor between said first capacitor and said first inductor; a second transformer having a primary winding and a secondary winding; a second inductor connected electrically in parallel with said primary winding of said second transformer, a first termination of said primary winding of said second transformer being connected to ground; a second capacitor being connected electrically in series between a second termination of said primary winding of said transformer and said second inductor, a second side of a power line switch being electrically connectable to said second capacitor between said second capacitor and said second inductor; a first termination of said secondary winding of said first transformer being connected in electrical communication with a first termination of said secondary winding of said second transformer; a second termination of said secondary winding of said first transformer being connected in electrical communication with a second termination of said secondary winding of said second transformer; and a transceiver electrically connected to said first termination of said secondary winding of said first transformer and to said second transformer of said secondary winding of said first transformer.

Claim 6

A coupling device for bypassing a switch in a power line distribution circuit, comprising: a first transformer having a primary winding and a secondary winding; a first inductor connected electrically in parallel with said primary winding of said first transformer, a first termination of said primary winding of said first transformer being connected to ground; a first capacitor being connected electrically in series between a second termination of said primary winding of said first transformer and said first inductor, a first side of a power line switch being electrically connectable to said first capacitor between said first capacitor and said first inductor; a second transformer having a primary winding and a secondary winding; a second inductor connected electrically in parallel with said primary winding of said second transformer, a first termination of said primary winding of said second transformer being connected to ground; a second capacitor being connected electrically in series between a second termination of said primary winding of said transformer and said second inductor, a second side of a power line switch being electrically connectable to said second capacitor between said second capacitor and said second inductor; a first termination of said secondary winding of said first transformer being connected in electrical communication with a first termination of said secondary winding of said second transformer; a second termination of said secondary winding of said first transformer being connected in electrical communication with a second termination of said secondary winding of said second transformer; and a transceiver electrically connected to said first termination of said secondary winding of said first transformer and to said second transformer of said secondary winding of said first transformer.