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Process corner indicator and estimation circuit

  • US 7,627,839 B1
  • Filed: 11/14/2005
  • Issued: 12/01/2009
  • Est. Priority Date: 11/14/2005
  • Status: Active Grant
First Claim
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1. An indicator circuit for determining an appropriate process corner from a distribution of possible process corners for a die including the indicator circuit, the die being responsive to an operating supply voltage, the indicator circuit comprising:

  • a clock generator circuit operable to generate a timing signal, the frequency of the timing signal depending upon the determined process corner of the die; and

    a logic module operable to receive the timing signal from the clock generator circuit and output a signal in response thereto that corresponds to the determined process corner of the die, whereinthe clock generator circuit is operated at a clock generator supply voltage that is lower than the operating supply voltage of the die, thereby reducing the frequency of the timing signal, increasing the difference in the frequency and, thus, resolution across the process corners.

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