Patent ID: 7184510

Claim:
An apparatus comprising: a charge pump circuit comprising: a first current source and second current source; a first differential pair of switches coupled to the first current source, the first differential pair of switches comprising a first switch controlled by a first voltage signal and a second switch controlled by a second voltage signal, the second voltage signal being inversed with respect to the first voltage signal; a second differential pair of switches coupled to the second current source, the second differential pair of switches comprising a third switch controlled by a third voltage signal and a fourth switch controlled by a fourth voltage signal, the fourth voltage signal being inversed with respect to the third voltage signal, wherein the first switch and the third switch are coupled in series between the first current source and the second current source, an output terminal is disposed between the first and third switches, the second switch and the fourth switch are coupled in series between the first current source and the second current source; a transient reducing circuit comprising: a third current source and a fourth current source; a fifth switch and a sixth switch coupled in series between the third current source and the fourth current source, the fifth switch controlled by the fourth voltage signal and the sixth switch controlled by the second voltage signal; and an input node between the fifth switch and the sixth switch, the input node coupled to a node between the second switch and the fourth switch.