Antifuse programming method and circuit which supplies a steady current after a programming voltage has dropped
First Claim
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1. An integrated circuit, supplied with a supply voltage Vcc, said integrated circuit comprising:
- an antifuse including terminals; and
a programming circuit for programming the antifuse, the programming circuit using a programming voltage Vpp that is substantially higher than the supply voltage Vcc,wherein the programming circuit comprises means to apply the supply voltage Vcc to the terminals of the antifuse immediately after an application of the programming voltage Vpp to the terminals of the antifuse so that programming of the antifuse is not interrupted.
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Abstract
An integrated circuit, supplied with a supply voltage Vcc, the intergrated circuit including: an antifuse including terminals; and a programming circuit for programming the antifuse, the programming circuit using a programming voltage Vpp that is substantially higher than the supply voltage Vcc, wherein the programming circuit including structure to apply the supply voltage Vcc to the terminals of the antifuse immediately after an application of the programming voltage Vpp to the terminals of the antifuse so that programming of the antifuse is not interrupted.
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Citations
20 Claims
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1. An integrated circuit, supplied with a supply voltage Vcc, said integrated circuit comprising:
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an antifuse including terminals; and a programming circuit for programming the antifuse, the programming circuit using a programming voltage Vpp that is substantially higher than the supply voltage Vcc, wherein the programming circuit comprises means to apply the supply voltage Vcc to the terminals of the antifuse immediately after an application of the programming voltage Vpp to the terminals of the antifuse so that programming of the antifuse is not interrupted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 18, 19, 20)
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11. A method of programming an antifuse in an integrated circuit comprising:
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connecting the antifuse to a source of a programming voltage Vpp, that is higher in voltage than a normal supply voltage Vcc for the integrated circuit, so as to apply said programming voltage Vpp to said antifuse; and connecting the antifuse to a voltage supply source immediately after applying said programming voltage Vpp to said antifuse so that programming of the antifuse is not interrupted, said voltage supply source having a lower potential than said source of said programming voltage Vpp, aid voltage supply source being capable of providing to said antifuse a lasting current with an intensity greater than that which can be provided in a lasting way by said source of said programming voltage Vpp. - View Dependent Claims (12, 13, 14)
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15. An integrated circuit, supplied with a supply voltage Vcc, the integrated circuit comprising:
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an antifuse including terminals; and a programming circuit that uses a programming voltage Vpp that is substantially higher than the supply voltage Vcc, said programming circuit including a first transistor, a first end of said first transistor being connected to a source of programming voltage Vpp, a second end of said first transistor being connected to the antifuse, and a gate of said first transistor being controlled by a programming command signal FB; a second transistor, a first end of said second transistor being connected to a source of supply voltage Vcc, a second end of said second transistor being connected to the source of programming voltage Vpp, and a gate of said second transistor being controlled by the programming command signal FB; a third transistor, a first end of said third transistor being connected to the source of supply voltage Vcc, a second end of said third transistor being connected to the source of programming voltage Vpp, and a gate of said third transistor being controlled by the programming command signal FB; and an insulation transistor, a first end of said insulation transistor being connected to a source of programming command signal FB, and a second end of said insulation transistor being connected to the gate of the first transistor, wherein the supply voltage Vcc can be applied to the terminals of the antifuse immediately after an application of the programming voltage Vpp to the terminals of the antifuse so that the programming of the antifuse is not interrupted. - View Dependent Claims (16, 17)
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Specification