Trim circuit for e-fuse

A trim circuit for an e-fuse unit, comprising:

• a mirroring device for receiving an enable signal, wherein when the mirroring device is triggered by the enable signal, the mirroring device generates a driving voltage;
• and
• a driving transistor coupled to the mirroring device, wherein in response to the driving voltage generated by the mirroring device, the driving transistor is turned on to generate an MOS current to an output node, wherein,
• the output node is further coupled to the e-f use unit, in response to the MOS current transmitted from the output node, the e-fuse unit is melted to a high impedance state.