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POWER SUPPLY APPARATUS FOR AN ELECTRICAL APPLIANCE

  • US 20150229222A1
  • Filed: 04/23/2015
  • Published: 08/13/2015
  • Est. Priority Date: 08/21/2012
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • an infrared sensing circuit configured to generate an enable signal in response to receipt of an infrared control signal; and

    a power supply circuit having an input coupled to receive said enable signal, said power supply circuit configured to generate a supply voltage;

    wherein said infrared sensing circuit comprises;

    a photodiode having an output;

    a switch having a control terminal coupled to the photodiode output and a first conduction terminal configured to supply said enable signal;

    a zener diode coupled between the control terminal of the switch and the first conduction terminal; and

    a DC blocking capacitor coupled between the photodiode output and the control terminal of the switch.

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