Power line carrier communications system transformer bridge

• US 4,642,607 A
• Filed: 08/06/1985
• Issued: 02/10/1987
• Est. Priority Date: 08/06/1985
• Status: Expired due to Term

• Current Assignee: National Semiconductor Corporation (Texas Instruments, Inc.)
• Original Assignee: National Semiconductor Corporation (Texas Instruments, Inc.)
• Inventors: Schnuelle, Kenneth W., Potwora, William E., Strom, Stephen A.
• Primary Examiner(s): Caldwell, Sr., John W.
• Assistant Examiner(s): Okonsky, David A.
• Application Number:
  US06/762,881
• Time in Patent Office: 553 Days
• Field of Search: 340/310 R, 340/310 A, 340/825.5, 340/825.51, 375/3, 375/4
• US Class Current: 307/104
• CPC Class Codes: H04B 2203/5408 using protocols
• CPC Class Codes: H04B 2203/5416 by adding signals to the wave form of the power source
• CPC Class Codes: H04B 2203/5466 using three phases conductors
• CPC Class Codes: H04B 2203/5479 using repeaters
• CPC Class Codes: H04B 2203/5483 using coupling circuits
• CPC Class Codes: H04B 2203/5495 having measurements and testing channel
• CPC Class Codes: H04B 3/542 the information being in digital form
• CPC Class Codes: H04L 12/4604 LAN interconnection over a backbone network, e.g. Internet, Frame Relay

Abstract

A power line carrier communications system transformer bridge/repeater for receiving on a power line communications network a series of original message bit streams generated by a transmitting module and for relaying on the power line communications network corresponding relayed message bit streams to receiving modules. The transformer bridge/repeater includes coupling means adapted for connection to a power line communications network for receiving original message bit streams and for coupling relayed message bit streams onto a power line communications network. Processor means is connected to the coupling means and is responsive to certain predetermined ones of the original message bit streams for generating a corresponding relayed message bit stream.

Claims

1. A powder line carrier communications system transformer bridge/repeater for receiving on a power line communications network a series of original message bit streams generated by a transmitting module and for relaying on said power line communications network corresponding relayed message bit streams to receiving modules, comprising:

transceiver means connected to means for converting said relayed message bit streams from serial binary bit streams to frequency-shift keyed bit streams and for converting original message bit streams from frequency-shift keyed bit streams to serial binary bit streams;

transformer means connected to said transceiver means for amplifying received original message bit streams provided to said transceiver means;

isolation means connected to said transformer means and adapted for connection to a power line having a plurality of differently phased lines, said isolation means coupling said original message bit stream to said transformer means from said power line and coupling said relayed message bit streams from said transformer means to said power line; and

processor means connected to said transceiver means and responsive to certain predetermined ones of said original message bit streams for generating corresponding relayed message bit streams.

2. The transformer bridge/repeater of claim 1 further comprising carrier detect means connected to said transformer means and said processor means, and responsive to each original message bit stream for providing a carrier detect signal wherein said carrier detect signal enables said processor means so as to generate said relayed message bit stream.

3. The transformer bridge/repeater of claim 2 further comprising sampling means connected between said transceiver means and said processor means for multiple sampling of the state of each bit in each original message bit stream and providing a conditioned input message bit stream wherein each bit in said conditional input message bit stream corresponds to the predominant sample state of each bit in said original message bit stream.

4. The transformer bridge/repeater of claim 3 further comprising station address means coupled to said processor means for providing a predetermined station address signal wherein said processor means compares said predetermined station address signal with a portion of each original message bit stream so as to determine said certain predetermined ones of said original message bit streams.