The buffer circuit includes a first transistor MP1 having a first end coupled to an output node N2 and a control node coupled to an input node N1; a second transistor MN2 coupled to a second end of the first transistor MP1; a third transistor MN1 coupled to the second transistor MN2 such that a current in the third transistor MN1 is mirrored to the second transistor MN2; a first sense device MP3 coupled to the output node N2; a first current source I2 coupled to the output node N2; a second current source I1 coupled to the third transistor MN1; a second sense device MP2 coupled to the third transistor MN1; and a bipolar device Q1 coupled to the output node N2 and having a base coupled to the second end of the first transistor MP1.

 
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