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US 2003/0189457 A1Published application
Zero Static Power Programmable Fuse Cell for Integrated Circuits
AssigneeFan Yung Ma
InventorFan Yung Ma
Life of this patent
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Abstract
A software programmable fuse cell which reduces or eliminates static power consumption is disclosed. The programmable fuse cell can be operated in programmable and non-programmable operating modes. Depending on the operating mode, the fuse cell output is determined by the actual state of the fuse or which fuse state the fuse cell is simulating. To reduce static power consumption, a latch is used to store the actual or simulated fuse state.
Claims3
A fuse cell comprising:
- fuse input terminals for receiving input signals;
- a fuse output terminal;
- a control circuit coupled to the input terminals;
- an initialization circuit coupled to the control circuit;
- a fuse circuit coupled to the control circuit, the fuse circuit comprising a fuse having a cut state or an uncut state;
- a latch coupled to the fuse output terminal and the control circuit, the latch being for storing information indicative of the fuse state;
- and
- a software programmable fuse circuit;
- and
- in response to the input signals at the input terminals, the fuse cell operates in an initialization mode, or in a first or second mode of fuse cell operation,
- wherein during initialization, the control circuit couples the initialization circuit to the latch to initialize the latch;
- in the first mode of operation, the control circuit couples the fuse circuit to the latch, and the fuse cell outputs an output determined by the state of the latch;
- and
- in the second mode of operation, the software programmable fuse circuit controls the output of the fuse cell based on the input signals.
11 more elements
Dependencies are inferred from the claim text.