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Power source for a hearing aid

  • US 6,410,997 B1
  • Filed: 07/30/1998
  • Issued: 06/25/2002
  • Est. Priority Date: 04/17/1998
  • Status: Expired due to Fees
First Claim
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1. An electronic device including a switch for controlling power to a load, said electronic device comprising:

  • a metal-air battery power source that produces a lower voltage output when the power source is deprived of an activating gas or a higher voltage output when exposed to an activating gas;

    a voltage comparator connected to said power source, said voltage comparator including a reference voltage that is compared to said voltage output of said power source to generate a control signal indicative of whether the power source is or is not exposed to the activating gas; and

    a switch responsive to said control signal that selectively connects the power source to said load, the switch connecting said power source to said load when said voltage level of said power source exceeds said reference voltage level by a predetermined voltage and said switch disconnecting the power source from said load when said voltage level of said power source is below said reference voltage level.

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