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Anti-fuse programming circuit

  • US 6,150,868 A
  • Filed: 06/29/1999
  • Issued: 11/21/2000
  • Est. Priority Date: 06/30/1998
  • Status: Expired due to Term
First Claim
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1. An anti-fuse programming circuit comprising:

  • operation switching means for precharging said anti-fuse programming circuit with a half voltage to operate it;

    an anti-fuse connected to said operation switching means, said anti-fuse being subjected to a dielectric breakdown when it is supplied with an overcurrent;

    sense signal input means for inputting a sense signal to verify a programmed state of said anti-fuse;

    breakdown voltage supply means for supplying a source voltage for the dielectric breakdown of said anti-fuse;

    output means for outputting a signal indicative of the programmed state of said anti-fuse in response to said sense signal inputted by said sense signal input means;

    current blocking means for blocking a current path from said breakdown voltage supply means to said anti-fuse in response to a control signal from said output means; and

    latch means for strongly stabilizing said anti-fuse at the level of said half voltage in response to said control signal from said output means.

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