Supercharge Your Innovation With Domain-Expert AI Agents!

Signal processing system and self-calibration digital-to-analog conversion method

A digital-to-analog conversion and digital-to-analog technology, applied in a signal processing system with a self-calibration mechanism and its digital-to-analog conversion field, can solve problems such as yield loss, and achieve the effects of increasing yield and avoiding process variation

Inactive Publication Date: 2015-11-04
NOVATEK MICROELECTRONICS CORP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the design of setting an external resistor outside the digital-to-analog converter can be used to reduce the influence of process variation, but this design still has the possibility of yield loss due to process variation

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
  • Signal processing system and self-calibration digital-to-analog conversion method
  • Signal processing system and self-calibration digital-to-analog conversion method
  • Signal processing system and self-calibration digital-to-analog conversion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] If a reference resistor known to be externally connected to the digital-to-analog converter is built into it, the built-in reference resistor will be affected by the manufacturing process and cause its resistance to be different, so that the operating voltage output by the digital-to-analog converter The level drifts, the operating range changes, and finally the yield of the chip decreases.

[0043] In view of this, in the exemplary embodiment of the present invention, through the self-calibration digital-to-analog conversion method, the digital-to-analog converter will make a feedback comparison of its output voltage, and adjust the resistance value of the reference resistor, adjust the reference current source and The mirror ratio of the current source array, adjusting the reference voltage or adjusting the size of the compensation current can reduce the impact of process changes, thereby improving chip yield and achieving low-cost, high-performance circuit design.

...

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 discloses a signal processing system which comprises a digital-to-analog converter, a comparing unit and a control unit. The digital-to-analog converter receives digital input and generates an output voltage. The comparing unit receives output voltage and compares a first output voltage with a reference voltage so as to generate an output value. The control unit receives an output value and generates a digital input in numerical value mapping mode by using a firmware or software, so as to revise the digital-to-analog converter. Besides, a self-calibrating digital-to-analog converting method is also provided.

Description

technical field [0001] The present invention relates to a signal processing system and its digital-to-analog conversion method, and in particular to a signal processing system with a self-calibration mechanism and its digital-to-analog conversion method. Background technique [0002] A digital-to-analog converter (DAC) is widely used in today's digital circuits, such as a digital-to-analog converter (video DAC, TVDAC) output to video and television. The known digital-to-analog converter usually has an external resistor, which is set to serve as a reference resistor for the internal reference current of the digital-to-analog converter when outputting. However, although the design of setting an external resistor outside the digital-to-analog converter can be used to reduce the influence of process variation, this design still has the possibility of yield loss due to process variation. Contents of the invention [0003] The present invention provides a signal processing syst...

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): H03M1/10
Inventor 陈育圣蔡佳宪林宥佐
Owner NOVATEK MICROELECTRONICS CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com