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Circuit simulator parameter extraction using a configurable ring oscillator

  • US 7,675,372 B2
  • Filed: 03/23/2007
  • Issued: 03/09/2010
  • Est. Priority Date: 08/09/2006
  • Status: Active Grant
First Claim
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1. A method comprising:

  • (a) operating a configurable ring oscillator in a first configuration, wherein the ring oscillator is configurable to have a selectable one of a plurality of signal paths between a first node of the ring oscillator and a second node of the ring oscillator, wherein in the first configuration a first oscillating signal passes from the first node through a first of the signal paths and to the second node;

    (b) making a first measurement of an operational characteristic of the ring oscillator configured in the first configuration;

    (c) operating the configurable ring oscillator in a second configuration, wherein in the second configuration a second oscillating signal passes from the first node through a second of the signal paths and to the second node;

    (d) making a second measurement of the operational characteristic of the ring oscillator configured in the second configuration;

    (e) using the first and second measurements to determine a circuit simulator parameter and designing a circuit with a circuit simulation tool configured with the circuit simulator parameter.

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