×

MOS integrated circuit for driving light-emitting diodes

  • US 5,061,861 A
  • Filed: 05/04/1989
  • Issued: 10/29/1991
  • Est. Priority Date: 05/20/1988
  • Status: Expired due to Fees
First Claim
Patent Images

1. An integrated circuit for driving at least first and second power using devices, comprising:

  • means for producing a first predetermined current;

    a current matter, responsive to said first predetermined current, for producing a second predetermined current;

    at least a first and a second driver devices;

    said first driver device including means for driving said first power-using device with a third current;

    said second driver device including means for driving said second power-using device with a fourth current;

    said third current having a first predetermined relationship to said second current;

    said fourth current having a second predetermined relationship to said second current;

    said means for producing a first predetermined current including a resistor; and

    means for permitting controlling a resistance of said resistor from a location external to said integrated circuit, whereby said first, second, third and fourth currents are controlled.

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