Anti-fuse programming circuit
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
An anti-fuse programming circuit comprising an operation switching part for precharging the anti-fuse programming circuit with a half voltage to operate it, an anti-fuse connected to the operation switching part, the anti-fuse being subjected to a dielectric breakdown when it is supplied with an overcurrent, a sense signal input part for inputting a sense signal to verify a programmed state of the anti-fuse, a breakdown voltage supply part for supplying a source voltage for the dielectric breakdown of the anti-fuse, an output part for outputting a signal indicative of the programmed state of the anti-fuse in response to the sense signal inputted by the sense signal input part, a current blocking part for blocking a current path from the breakdown voltage supply part to the anti-fuse in response to a control signal from the output part, and a latch part for strongly stabilizing the anti-fuse at the level of the half voltage in response to the control signal from the output part. According to the present invention, the programmed state of the anti-fuse can be verified and current consumption can significantly be reduced in programming the anti-fuse.
-
Citations
7 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification