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Image sensing system and relative amplification and digitization circuit thereof

A circuit and amplifier technology, applied in the field of image sensing systems and related amplifying/digital circuits, can solve problems such as lack of signal amplification

Active Publication Date: 2011-07-27
HIMAX IMAGING LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, since the existing analog-to-digital converter structure lacks the function of signal amplification, this makes the traditional image sensing system 100 have to additionally use a set of signal amplification circuits as the line amplifier 120 to improve the SNR (Signal to Noise Ratio). Ratio, SNR) and improve the image quality of the image sensing system 100

Method used

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  • Image sensing system and relative amplification and digitization circuit thereof
  • Image sensing system and relative amplification and digitization circuit thereof
  • Image sensing system and relative amplification and digitization circuit thereof

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Embodiment Construction

[0018] Certain terms are used throughout the specification and following claims to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This description and the following claims do not use the difference in name as the way to distinguish components, but the difference in function of the components as the criterion for distinguishing. The term "comprising" mentioned throughout the specification and subsequent claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0019]...

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Abstract

An amplification and digitization circuit having the functions of signal amplification and a comparator comprises an amplifier and a control circuit, wherein the amplifier has an input end and an output end, and the control circuit is coupled with the input end and the output end of the amplifier. When the amplification and digitization circuit is operated in an amplification mode, the control circuit has first configuration to receive a first input signal and control the amplifier to generate an output voltage at the output end of the amplifier according to the first input signal and an amplification system; and when the amplification and digitization circuit is operated in an analog to digital conversion mode, the control circuit has second configuration to receive a second input signal and control the amplifier to generate a compassion result according to the second input signal and the output voltage.

Description

technical field [0001] The present invention relates to an image sensor, in particular to an image sensing system and its related amplification / digitization circuit. Background technique [0002] In the image processing system, the analog-to-digital converter (ADC) plays an indispensable and important role, and is widely used in various application fields, for example: in complementary metal oxide semiconductor (CMOS) image sensor In the measurement system (CIS), the analog-digital converter is used to convert the received sensing signal from analog form to digital form, and the analog-digital converter can be further subdivided into flash according to its internal circuit structure Type (flash) analog-to-digital converter, ramp (ramp) analog-to-digital converter, (pipelined) pipeline-type analog-to-digital converter and continuous progressive (successive approximation) analog-to-digital converter, etc. [0003] refer to figure 1 , figure 1 Shown is a schematic diagram of...

Claims

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Application Information

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IPC IPC(8): H04N5/335
Inventor 印秉宏陈世峰
Owner HIMAX IMAGING LIMITED