×

Dual current-source digital-input circuit for an industrial automation system

  • US 7,019,318 B2
  • Filed: 12/29/2003
  • Issued: 03/28/2006
  • Est. Priority Date: 12/29/2003
  • Status: Expired due to Term
First Claim
Patent Images

1. An interface circuit comprising:

  • a first terminal capable of being operably connected to an opto-coupler;

    a second terminal capable of being operably connected to the opto-coupler;

    a first current-source being operably connected to the first terminal;

    a second current-source being operably connected to the second terminal; and

    ,a reference voltage being operably connected to the first current-source and the second current-source, the first current-source being operably connected to the second current-source wherein the first and second current-source cooperate to provide a total input current in accordance with a set of operating characteristics for an industrial automation system, wherein the opto-coupler is operably connected to the industrial automation system.

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