公开(公告)号：US12034368B1

公开(公告)日：2024-07-09

申请号：US18174442

申请日：2023-02-24

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Zhenfu Tian ,  Dong Yang ,  Zheng Yang

IPC: H02M3/07 ,  G05F1/46 ,  G05F3/20 ,  H02M1/00

CPC classification number: H02M3/071 ,  G05F1/465 ,  G05F3/205 ,  H02M1/0045

Abstract: Image sensors with improved negative pump voltage settling, and circuitry for the same, are disclosed herein. In one embodiment, a power supply settling circuit includes a negative charge pump and a reference voltage generator. An output of the negative charge pump is selectively coupled to a first node of the negative pump settling circuit via a first switch, and an output of the reference voltage generator is selectively coupled to a second node of the negative pump settling circuit via a second switch. The first node is further selectively coupled to ground via a third switch, and the second node is further selectively coupled to ground via a fourth switch. The first node can additionally be coupled to a first pad, and the second node can additionally be coupled to a second pad. The pads can each be coupled to a capacitor, such as an off-chip capacitor.