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

Analog-to-digital (AD) conversion method based on cosine algorithm and Gray code

A technology of analog-to-digital conversion and gray coding, applied in the direction of analog-to-digital converters, etc., can solve problems such as increasing system errors, large noise, and affecting conversion accuracy

Inactive Publication Date: 2013-01-09
BEIJING JIAOTONG UNIV
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a sudden change in the output waveform of the circuit margin of each stage, and it is easy to introduce large noise, thereby affecting the conversion accuracy. Due to the existence of the digital-to-analog converter DAC, it also increases the source of system errors.

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
  • Analog-to-digital (AD) conversion method based on cosine algorithm and Gray code
  • Analog-to-digital (AD) conversion method based on cosine algorithm and Gray code
  • Analog-to-digital (AD) conversion method based on cosine algorithm and Gray code

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0061] A preferred embodiment of the bidirectional communication isolation circuit according to the present invention will be specifically described below with reference to the accompanying drawings. Herein, like reference numerals denote like units or elements.

[0062] A / D conversion is to convert the analog voltage into the corresponding binary value output. Although the result of A / D conversion is an integer value, from the perspective of binary data bits, each bit value can also be regarded as a sequence of 0 and 1 that varies independently with the input voltage. Take 4-bit A / D conversion as an example, as figure 1 Process state diagram for natural binary code versus reference voltage shown.

[0063] Depend on figure 1 The conversion state of each conversion bit can be obtained,

[0064] D 0 = 1 ( U ...

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 provides a binary analog-to-digital (AD) conversion method based on a cosine algorithm and a Gray code, which is characterized by comprising the following steps: sampling an analog input signal Ui; based on the cosine algorithm, calculating the n-bit data value Yn of the analog input signal Ui, wherein n is a natural number; comparing the data value Yn with zero to obtain an n-bit Gray code value Gn; and using the sequence of the Gray code Gn as an AD conversion output signal of the analog input signal. By using the Gray code mode, spike pulse possibly existing in the code can be eliminated; and due to the introduction of the cosine function algorithm, a full parallel coding method is realized. By using the concatenated pipeline type coding method based on the cosine algorithm, the jumping of the pipeline output of each stage can be effectively eliminated.

Description

technical field [0001] The present invention relates to a digital signal and analog signal conversion method, and more specifically, the present invention relates to an analog-to-digital conversion method based on cosine algorithm and gray coding. Background technique [0002] Analog-to-digital converter ADC is a bridge that converts analog signals into digital signals, and is the key and bottleneck of the development of electronic technology. At present, there are many types of ADCs in the world, such as parallel ADCs, successive approximation ADCs, integral ADCs, Σ-Δ ADCs, and pipeline ADCs. Various types of ADCs have their advantages and disadvantages and can meet specific application requirements. Parallel comparison ADC, also known as blinking ADC, is the fastest conversion speed among A / D converters, and it plays an irreplaceable role in video coding and other occasions that require high-speed digital-to-analog conversion. Since the resolution is limited by the die s...

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
IPC IPC(8): H03M1/12
Inventor 吕锦柏王毅
Owner BEIJING JIAOTONG UNIV
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