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Power management circuit for selectively applying power to network monitoring circuitry which monitors the receipt of network wake-up messages

  • US 6,701,442 B1
  • Filed: 05/09/2000
  • Issued: 03/02/2004
  • Est. Priority Date: 05/09/2000
  • Status: Expired due to Term
First Claim
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1. In a peripheral device for connecting with a computing device, a power management circuit for selectively applying power to network monitoring circuitry on said peripheral device, said circuit comprising:

  • a) a power switch control circuit configured so as to selectively determine when to apply power to said network monitoring circuitry, wherein said network monitoring circuitry is configured to monitor the receipt of network messages directing said computing device to wake-up from a low or no power state; and

    b) a power switch circuit configured to receive at least one of an auxiliary input power and a main input power and, when directed by said power switch control circuit, conducting said at least one of said auxiliary input power and said main input power as a selectively switched power to said network monitoring circuitry, said power switch circuit comprising;

    (i) an auxiliary input power switch comprising a first switching element and a second switching element that are connected to selectively output the auxiliary input power to said network monitoring circuitry when an auxiliary input power control is actuated by the power switch control circuit; and

    (ii) a main input power switch comprising a first switching element and a second switching element that are connected to selectively output the main input power to said network monitoring circuitry when a main input power control is actuated by the power switch control circuit.

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