×

Communication system and method

  • US 4,520,488 A
  • Filed: 11/02/1981
  • Issued: 05/28/1985
  • Est. Priority Date: 03/02/1981
  • Status: Expired due to Term
First Claim
Patent Images

1. A data communication system comprisinga direct current power supply;

  • a power supply current carrying circuit means connected to said power supply supply for distributing a direct current output from said power supply,a data transmitting means connected to said current carrying circuit for producing first direct current variations in said direct current from said power supply supplied to said circuit representative of analog data, and second direct current variations in said direct current from said power supply supplied to said current circuit representative of digital data, said first and second current variations being alternate operations anddata receiving means connected to said circuit for receiving said first and second current variations as representations of analog and digital data, respectively.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×