Circuit for programming antifuse bits
AssigneeMicron Technology, Inc.
InventorsPatrick J. Mullarkey, Casey R. Kurth, Jason Graalum, Daryl L. Habersetzer
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Abstract
Circuitry for programming antifuse elements is provided which permits all antifuse elements in a bank to be programmed simultaneously, thereby enhancing the speed at which antifuse elements may be programmed. In one embodiment, a feedback circuit is associated with each antifuse element to stop the flow of current through the antifuse element once it is programmed. In another embodiment, circuitry is provided for generating a separate programming pulse for each antifuse element, which is selected for programming.
Claims8
A method of programming an antifuse element in an integrated circuit memory device, comprising:
- connecting said antifuse element in series with a programming voltage;
- associating said antifuse element with a selection transistor to provide a flow of current through said antifuse element when said selection transistor is enabled;
- connecting said selection transistor is series with a NOR gate having three inputs and an output;
- connecting a protection transistor to said antifuse element at a first node;
- connecting said protection transistor to said selection transistor at a second node;
- connecting said first node to an input of said NOR gate.
Dependencies are inferred from the claim text.