Patent ID: 6545926
Filing Date: 2003-04-08
Classification: G11C

Abstract:
An antifuse address detecting circuit comprising:an antifuse having a capacity type structure, and changing into a low-resistance element when said capacity type structure is blown by application of a high voltage; a first node connected to one of first and second terminals of said antifuse; a second node connected to the other terminal of said antifuse; first supply means for supplying the high voltage required for blowing said antifuse to said first node in a program mode for blowing said antifuse; second supply means for supplying a voltage to said second node; and a control circuit for controlling supply of the voltage from said first supply means to said first node in response to the voltage on said second node; wherein said second supply means supplies a first voltage to said second node at the time of start of said program mode, and supplies a voltage higher than said first voltage to said second node after the start of said program mode, and said control circuit includes a transistor being turned on in response to said first voltage on said second node, and being turned off when said second node carries a voltage exceeding a predetermined voltage.