| 摘要 |
A method and apparatus are provided for protecting electronic fuse (eFuse) information. A current balancing circuit is provided that maintains a constant current demand on the eFuse voltage supply that is sufficient to blow an eFuse. Normally the constant current is applied to a semiconductor core. When an eFuse is being blown, the constant current is diverted away from the core to the eFuse and as the eFuse blows, the constant current is again dumped to the semiconductor core. Thus, a change in current due to the transient of the eFuse being blown is not detectable and the information that an eFuse has been blown is kept secure.
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