| CPC G11C 17/18 (2013.01) [G11C 17/16 (2013.01); H03K 17/6871 (2013.01)] | 17 Claims |
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1. An electronic fuse circuit comprising:
an electronic fuse array;
a comparator, a first input terminal of the comparator receives a reference voltage, a second input terminal of the comparator is connected to the electronic fuse array, wherein the comparator determines a bit value stored in the electronic fuse array; and
a power circuit, connected to the electronic fuse array, comprising:
a pass transistor of a P-type metal-oxide-semiconductor comprising a bulk electrode, a gate electrode, a source electrode receiving a system high voltage, and a drain electrode connected to a bit line;
a bulk voltage control circuit independently providing a bulk voltage to the bulk electrode; and
a buffer circuit connected to the gate electrode of the pass transistor,
wherein a last-stage buffer of the buffer circuit is activated by the bulk voltage to control the pass transistor,
wherein the bulk voltage control circuit comprises:
a first P-type metal-oxide-semiconductor transistor comprising a first source electrode connected to an operation voltage, a first drain electrode connected to an output node, and a first gate electrode connected to the system high voltage; and
a second P-type metal-oxide-semiconductor transistor comprising a second source electrode connected to the system high voltage, a second drain electrode connected to the output node for providing the bulk voltage, and a second gate electrode connected to the operation voltage.
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