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Column a/d converter, column a/d conversion method, solid-state imaging device, and camera system

A technology of converters and conversion functions, applied in the field of camera systems, can solve problems such as difficult FD amplifiers, obtaining driving force, reducing data rates, etc., to achieve the effects of reducing fluctuations, low power supply voltage, and reducing counter characteristic degradation

Active Publication Date: 2019-01-25
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The reason for this is that it is difficult to obtain sufficient driving force from an FD amplifier arranged in a pixel, so it is desired to reduce the data rate, and it is better to use parallel processing

Method used

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  • Column a/d converter, column a/d conversion method, solid-state imaging device, and camera system
  • Column a/d converter, column a/d conversion method, solid-state imaging device, and camera system
  • Column a/d converter, column a/d conversion method, solid-state imaging device, and camera system

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Embodiment Construction

[0097] Hereinafter, embodiments of the present technology will be described in detail with reference to the accompanying drawings. Note that, in this specification and the appended drawings, elements that have substantially the same function and structure will be denoted with the same reference signs, and repeated explanation will be omitted.

[0098] Note that descriptions will be made in the following order:

[0099] 1. Overview of semiconductor devices

[0100] 1.1 Configuration Example of First Arrangement of Semiconductor Device

[0101] 1.2 Configuration Example of Second Arrangement of Semiconductor Device

[0102] 1.3 Configuration Example of Third Arrangement of Semiconductor Device

[0103] 2. Overview of solid-state imaging devices

[0104] 2.1 Basic configuration example of solid-state imaging device

[0105] 2.2 Example of solid-state imaging device equipped with parallel-column ADC Overall configuration example

[0106] 2.3 Basic configuration example of fi...

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Abstract

The present invention relates to a column A / D converter, a column A / D conversion method, an imaging device, and a camera system capable of reducing the amount of IR drop by dispersing the current consumed during the counting operation, reducing counter characteristic degradation, and easily reducing power supply voltage fluctuations, and operation at low power supply voltages is realized. The column A / D converter includes a plurality of column processing units including an A / D conversion function; a plurality of counters configured to generate digital codes in response to a reference clock and corresponding to each column processing unit or a group of column a processing unit is arranged; and a count start offset unit configured to trigger a dummy count operation in each counter before supplying a reference clock to the counter, and for at least two or more of the plurality of counters to Offset count start code.

Description

technical field [0001] The present invention relates to a column A / D converter suitable for a solid imaging device such as a CMOS image sensor, a column A / D conversion method, a solid imaging device, and a camera system. Background technique [0002] There has been proposed a CMOS image sensor that includes a pixel portion having a plurality of pixels arranged in a two-dimensional array, wherein the data read from each pixel in the pixel portion is sequentially read per pixel column. image signal, and CDS or other processing is performed on each column signal that is converted into an image signal and output as an image signal. [0003] The CMOS image sensor has a floating diffusion amplifier (amp) including a floating diffusion (FD) for each pixel. The output is usually a parallel column output type in which a certain row in the pixel array is selected and then read simultaneously in the column direction. [0004] The reason for this is that it is difficult to obtain suff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/378H03M1/56H04N5/374
CPCH03M1/56H03M1/0845H03M1/123H03M1/0624H03M1/0863H03K21/023H04N25/617H04N25/79H04N25/78H03K4/08H03M1/002H03M1/0617H03M1/12H04N25/772H04N25/75
Inventor 西田祐辅久松康秋
Owner SONY CORP