×

Device for detection of power-off

  • US 20050135130A1
  • Filed: 11/24/2004
  • Published: 06/23/2005
  • Est. Priority Date: 12/17/2003
  • Status: Active Grant
First Claim
Patent Images

1. A device for detecting a power-off of external input power from a power supply device, comprising:

  • a detection unit for generating an induced current in response to an AC current provided by the power supply device;

    a voltage supply unit for converting the induced current generated by the detection unit into a detection voltage; and

    a voltage comparison unit for comparing the detection voltage provided by the voltage supply unit and a reference voltage, and for providing a power-off detection signal when there is a difference between the detection voltage and the reference voltage.

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