Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and system for realizing high-resolution analog-to-digital conversion by low-resolution ADC (Analog to Digital Converter)

An analog-to-digital conversion, high-resolution technology, applied in the electrical field, can solve problems such as data transmission link delay, and achieve the effects of increased data transmission rate, strong portability, and high signal-to-noise ratio

Inactive Publication Date: 2013-07-24
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme requires an analog comparison, which will cause a delay in the data transmission link

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and system for realizing high-resolution analog-to-digital conversion by low-resolution ADC (Analog to Digital Converter)
  • Method and system for realizing high-resolution analog-to-digital conversion by low-resolution ADC (Analog to Digital Converter)
  • Method and system for realizing high-resolution analog-to-digital conversion by low-resolution ADC (Analog to Digital Converter)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] The invention provides a method for realizing high-resolution analog-to-digital conversion by a low-resolution ADC, the method comprising the following steps:

[0049] 1) Post-stage preprocessing of the CCD analog signal generated by the FPA (focal plane assembly):

[0050] The purpose of post-stage preprocessing of the CCD analog signal generated by the FPA (focal plane assembly) is to make the output signal have the same change trend as the illuminance received by the CCD sensor, and to suppress the interference introduced during the transmission process and minimize the noise in the CCD output signal. Reset noise (kTC noise). Usually available figure 2 In order to suppress the interference introduced in the transmission process, the buffer circuit first buffers the received video signal, which is realized by an operational amplifier, and the gain is -1 times. The purpose of the correlated double sampling circuit CDS is to reduce the reset noise (kTC noise) of the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method and a system for realizing high-resolution analog-to-digital conversion by a low-resolution ADC (Analog to Digital Converter), which aim at a CCD (Charge-coupled Device) camera. The method comprises the following steps: carrying out subsequent preprocessing on a CCD analog signal generated by an FPA (Focusing Plane Assembly); amplifying a CCD analog video signal after the preprocessing to obtain an amplified video signal; carrying out analog-to-digital conversion on the amplified video signal to obtain a low-bit ADC quantization result; and converting the low-bit quantization result into high-bit quantization result. The invention provides the method and the system for realizing high-resolution analog-to-digital conversion by the low-resolution ADC, whichaim to the CCD camera, and have small delay, high transmission ratio, strong anti-interference capability, high SNR (Signal to Noise Ratio) and wide application range.

Description

technical field [0001] The invention belongs to the field of electricity, and relates to an analog-to-digital conversion method, in particular to a method and system for realizing high-resolution analog-to-digital conversion by utilizing a low-resolution ADC for a CCD camera. Background technique [0002] CCD cameras are now widely used in astronomical detection, and their spectral range covers 300nm-1100nm. In order to make full use of the dynamic range of the CCD detector, when designing the CCD signal processing circuit and selecting the ADC, it should be satisfied that the dynamic range of the ADC is greater than that of the CCD. Current CCDs, especially scientific-grade CCDs, have a dynamic range of up to 10 5 : 1, even 10 6 : 1, at this time to satisfy DR ADC ≥DR CCD , you must choose an ADC with a resolution of 18-20bit. However, high-level, high-performance high-resolution ADCs are rare and expensive, so in signal processing circuits, the following two situation...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/30H04N5/372
Inventor 邱跃洪陈智文延汶德胜姚大雷江宝钽高博
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com