Anti-fuse element
AssigneesSTMicroelectronics (Crolles 2) SAS, Freescale Semiconductor, Inc.
InventorsBertrand Borot, Michel Zecri
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Abstract
Programmable anti-fuse circuitry including at least one anti-fuse cell having a first anti-fuse device coupled between a supply voltage and a first node and a second anti-fuse device coupled between the first node and a ground voltage, and control logic coupled to the first node and arranged to generate a programming voltage having one of at least a first voltage level for breaking-down the first anti-fuse device but not the second anti-fuse device and coupling the first node to the supply voltage; and a second voltage level for breaking-down the second anti-fuse device but not the first anti-fuse device and coupling the first node to the ground voltage.
Claims11
Programmable anti-fuse circuitry comprising:
- at least one anti-fuse cell comprising a first anti-fuse device coupled between a supply voltage and a first node and a second anti-fuse device coupled between the first node and a ground voltage;
- and
- control logic coupled to the first node and arranged to generate a programming voltage having one of at least:
- a first voltage level for breaking-down said first anti-fuse device but not said second anti-fuse device and coupling said first node to said supply voltage;
- and
- a second voltage level for breaking-down said second anti-fuse device but not said first anti-fuse device and coupling said first node to said ground voltage.
A method of programming anti-fuse circuitry comprising at least one anti-fuse cell comprising first and second anti-fuse devices coupled to a first node, said first anti-fuse device also coupled to a supply voltage and said second anti-fuse device also coupled to a ground voltage, the method comprising:
- applying a programming voltage at said first node for breaking-down one of said first and second anti-fuse devices, said programming voltage having one of at least two voltage levels comprising:
- a first voltage level for breaking-down said first anti-fuse device but not said second anti-fuse device and coupling said first node to said supply voltage;
- and
- a second voltage level for breaking-down said second anti-fuse device but not said first anti-fuse device and coupling said first node to said ground voltage.
Dependencies are inferred from the claim text.