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

Assembly line type D/A convertor capable of calibrating capacitance mismatch and finite gain error

An analog-to-digital converter, a pipelined technology, applied in the direction of analog/digital conversion, code conversion, analog/digital conversion calibration/testing, etc., can solve problems such as difficult implementation and time-consuming, and achieve the effect of improving performance

Inactive Publication Date: 2008-07-16
EMENSA TECH CO LTD
View PDF5 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, these methods are either difficult to implement, time-consuming, require additional conversion processing steps, or both

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
  • Assembly line type D/A convertor capable of calibrating capacitance mismatch and finite gain error
  • Assembly line type D/A convertor capable of calibrating capacitance mismatch and finite gain error
  • Assembly line type D/A convertor capable of calibrating capacitance mismatch and finite gain error

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The block diagram of the implementation scheme based on the present invention is shown in FIG. 4 , wherein the pipelined analog-to-digital converter adopts a structure of 1.5 bits per stage, and the resolution is 10 bits (N=10) as an example. Compared with the traditional analog-to-digital converter 100 in FIG. 1 , the new analog-to-digital converter 400 has an additional sub-conversion stage circuit 410 and a control clock generation circuit 440 . The clock input passes through the control clock generation circuit 440 to generate the required clock sequence to control the operation of each module, including the optional sample and hold circuit 401, sub-conversion stage circuits 402-410, the last full-parallel stage circuit 420 and digital correction circuit 430. Generally speaking, in addition to the last 2-bit all-parallel stage circuit, a 10-bit pipelined analog-to-digital converter also needs 8 sub-conversion stage circuits. However, in this new structure, in order...

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 belongs to the analog-to-digital converter (ADC) technical field, in particular to a pipelining ADC capable of calibrating capacitance mismatch and finite gain error. Based on the prior similar ADC, the invention further adopts a sub-switching stage circuit, a clock generation control circuit and an error detector, and ensures that each sub-switching stage circuit has two operation modes, i.e. a normal operation mode and a calibration mode; meanwhile, each sub-switching stage circuit uses the same error detector to amplify the output of the sub-switching stage circuit under calibration; in addition, each sub-switching stage circuit has a storage unit storing the output of the error detector and is used to control the gain of the amplifier of the circuit of the stage; moreover, the absolute values of the two errors caused by the finite gain of the amplifier and capacitance mismatch are equal in value but opposite in symbol, thereby balancing out each other and ensuring the circuit of the stage realizes non-deviation conversion.

Description

technical field [0001] The invention belongs to the technical field of analog-to-digital converters, and in particular relates to a pipelined analog-to-digital converter using a low-gain amplifier. Background technique [0002] An analog-to-digital converter (ADC) is a component that converts an analog signal into a digital signal, that is, digitizes the analog signal. In high-speed analog-to-digital converters, the fastest reported so far is the all-parallel (flash) structure. However, an analog-to-digital converter based on a fully parallel structure requires a large number of extremely accurate and fast comparators, which will consume a large amount of chip area and power. Among the many analog-to-digital converter structures, many can overcome the shortcomings of the all-parallel structure of the analog-to-digital converter, and the pipeline structure is one of them. Moreover, the pipeline architecture provides a better trade-off between speed, accuracy, power consumpt...

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 Applications(China)
IPC IPC(8): H03M1/10
CPCH03M1/0695H03M1/1057H03M1/44
Inventor 陈诚袁及人
Owner EMENSA TECH CO LTD
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