Patent ID: 8058921
Filing Date: 2011-11-15
Classification: G11C

Abstract:
1. A fuse circuit comprising: a fuse having an intact state and a blown state, wherein said fuse is in said blown state if a blowing current flows through said fuse; a first transistor coupled between a power source and said fuse; a second transistor complementary to said first transistor and coupled between said fuse and ground; a third transistor comprising a gate coupled to a first terminal of said fuse and a source coupled to a second terminal of said fuse and for detecting a voltage drop across said fuse; and a reading current source coupled to said fuse and for providing a reading current flowing through said fuse to generate said voltage drop, wherein said reading current is adjusted according to said intact and blown states, wherein said first transistor and said second transistor are turned on for enabling said blowing current to flow through said fuse, and wherein said first transistor and said second transistor are for reducing an electrostatic discharge current flowing through said fuse.