The present invention discloses a current generating apparatus for
generating an output current. The current generating apparatus includes:
a first current mirror; a first bias current generator for providing a
first bias current, and the first bias current generator includes: a
first current source for providing the first current; and a capacitive
device for conducting a reference current; a second current mirror for
generating a second mirror current; a second bias current generator for
generating a second current; a third current source for providing a third
current, wherein the second mirror current is equal to the third current;
a feedback circuit; and a fourth current source for providing a fourth
current, wherein the output current is outputted at an output node of the
first current mirror.