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Method and an apparatus to detect low voltage

  • US 7,123,033 B1
  • Filed: 09/20/2004
  • Issued: 10/17/2006
  • Est. Priority Date: 09/20/2004
  • Status: Expired due to Fees
First Claim
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1. An apparatus, comprising:

  • a main circuit powered at a supply voltage, wherein the supply voltage changes over time; and

    a test circuit coupled to the main circuit, the test circuit being representative of a voltage sensitivity of the main circuit without sharing any common component with the main circuit, the test circuit to dynamically determine if the supply voltage is above a minimum voltage at which the main circuit operates, wherein the minimum voltage changes over at least one of a temperature and a time and between different instances of the main circuit.

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