公开(公告)号：US20200014873A1

公开(公告)日：2020-01-09

申请号：US16491123

申请日：2018-02-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yutaka ABE ,  Kazuko NISHIMURA ,  Hiroshi FUJINAKA ,  Norihiko SUMITANI ,  Yosuke HIGASHI

IPC: H04N5/378 ,  H03M1/38 ,  H03M1/56 ,  H03K3/356 ,  H03K5/24 ,  H03F3/45

Abstract: A solid-state imaging device includes a first A/D converter circuit and a second A/D converter circuit per column. The first A/D converter circuit performs a first A/D conversion that (i) refines, using a first comparator, a range including a potential of an analog signal through a binary search, and (ii) generates, based on a result of the binary search, a first digital signal being a high-order portion of the digital signal. The second A/D converter circuit performs a second A/D conversion that generates a second digital signal being a low-order portion that is a remainder of the digital signal by measuring a time required for an output of the second comparator to be inverted, the second comparator comparing a quantitative relationship between the analog signal refined and a ramp signal.