Patent ID: 7863985

Claim:
An apparatus comprising: a first current mirror having a first and a second set of terminals, wherein at least one terminal from the first set of terminals of the first current mirror receives an input signal, and wherein at least one terminal from the second set of terminals of the first current mirror is coupled to an output node; a transistor having a first passive electrode, a second passive electrode, and a control electrode, wherein the transistor is coupled to at least one terminal from the second set of terminals of the first current mirror at its first passive electrode and to at least one terminal from the second set of terminals of the first current mirror at its control electrode; a current source that is coupled to the control electrode of the transistor; and a second current mirror having a first and a second set of terminals, wherein at least one terminal from the first set of terminals of the second current mirror is coupled to the second passive electrode of the transistor, and wherein at least one terminal from the second set of terminals of the second current mirror is coupled to the current source, and wherein at least one terminal from the second set of terminals of the second current mirror is coupled to the output node.