Variable resistance memory cell based electrically resettable fuse device
First Claim
1. An integrated circuit including an electrically resettable fuse device, the electrically resettable fuse device comprising:
- a plurality of resettable fuse modules coupled in parallel, each resettable fuse module including a fuse element characterized by a first and a second impedance states, the plurality of resettable fuse modules are configured such that;
when the fuse element is in the first impedance state, and a current flowing through each fuse element in a first direction exceeds a current limit, the fuse element enters into the second impedance state; and
when the fuse element is in the second impedance state and, in response to a global reset signal and a local reset signal, a current is applied to the fuse element in a second direction opposite the first direction, the fuse element is reset to the first impedance state.
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Accused Products
Abstract
An integrated circuit includes an electrically resettable fuse device. The electrically resettable fuse device has a plurality of resettable fuse modules coupled in parallel. Each resettable fuse module including a fuse element characterized by a first and a second impedance states. The plurality of resettable fuse modules are configured such that when the fuse element is in the first impedance state, and a current flowing through each fuse element in a first direction exceeds a current limit, the fuse element enters into the second impedance state. When the fuse element is in the second impedance state and, in response to a global reset signal and a local reset signal, a current is applied to the fuse element in a second direction opposite the first direction, the fuse element is reset to the first impedance state.
22 Citations
20 Claims
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1. An integrated circuit including an electrically resettable fuse device, the electrically resettable fuse device comprising:
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a plurality of resettable fuse modules coupled in parallel, each resettable fuse module including a fuse element characterized by a first and a second impedance states, the plurality of resettable fuse modules are configured such that; when the fuse element is in the first impedance state, and a current flowing through each fuse element in a first direction exceeds a current limit, the fuse element enters into the second impedance state; and when the fuse element is in the second impedance state and, in response to a global reset signal and a local reset signal, a current is applied to the fuse element in a second direction opposite the first direction, the fuse element is reset to the first impedance state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electronic circuit, comprising:
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a circuit module with a maximum current tolerance; and an electrically resettable fuse device; wherein the circuit module and the electrically resettable fuse device are coupled in series between a positive supply rail and a negative supply rail; wherein the electrically resettable fuse device includes a plurality of resettable fuse modules coupled in parallel, each resettable fuse module including a fuse element characterized by a first and a second impedance states, the plurality of resettable fuse modules being configured such that; when each of the fuse element is in the first impedance state and a current flows in each of the fuse elements in a first direction, the electrically resettable fuse device is characterized by an impedance lower than a predetermined low impedance value; when a current flowing through the circuit module and the electrically resettable fuse device exceeds the maximum current tolerance of the circuit module, each of the fuse element enters into the second impedance state, and the electrically resettable fuse device is characterized by an impedance higher than a predetermined high impedance value to reduce the current flowing through the circuit module; and when a current is applied to each fuse element in a second direction opposite the first direction, in response to one or more reset signals, the fuse element is reset to the first impedance state. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A fuse device, comprising:
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a plurality of resettable RRAM (resistive random access memory) fuse modules; a global reset signal line; and a local reset signal line for each of the plurality of resettable RRAM fuse modules;
wherein;each resettable RRAM fuse module includes an RRAM element and four switch devices that are coupled to either the global reset signal line or the local reset signal line, a first switch device, the RRAM element, and a second switch device are coupled in series for providing a conduction path through the RRAM element in a first direction, a third switch device, the RRAM element, and a fourth device coupled in series for providing a conduction path through the RRAM element in a second direction.
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Specification