Column A/D converter, column A/D conversion method, solid-state imaging element and camera system

摘要

A solid-state imaging device having an analog-digital converter, and an analog-digital conversion method are described herein. An example of a solid-state imaging device includes a column processing section that includes a low-level bit latching section. The low-level bit latching section receives a comparator output from a comparator and a count output from a counter, and the low-level bit latching section latches a count value.

主权项

1. A solid-state imaging device comprising:
a column processing section including:
a Gray code counter;a low-level bit latching section configured to receive a comparator output from a comparator and a count output from the Gray code counter and to latch a Gray code count value;a high-level bit ripple counting section configured to receive a latch output from a low-level bit circuit nearest to a high-level side of the low-level bit latching section and to perform a count operation; anda bit inconsistency prevention section configured to prevent bit inconsistency between the low-level bit circuit nearest to the high-level side of the low-level bit latching section and a high-level bit ripple counter circuit nearest to a low-level side of the high-level bit ripple counting section.