Comparator with adjustable reference voltage

A reference voltage and comparator technology, applied in the field of comparators, can solve problems such as large difference in capacitance ratio, large influence, large offset voltage, etc., and achieve the effect of reducing offset voltage and improving performance

Active Publication Date: 2009-06-24
北京中科微知识产权服务有限公司
View PDF0 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] But the capacitive voltage divider reference voltage adjustable comparator also has some disadvantages
The decision level of the comparator is a uniformly distributed voltage value between the reference levels, because the decision level of the comparator is related to the ratio of the reference voltage and the capacitance. When the voltage value is in the middle of the reference level, the ratio of the capacitance Roughly the same, so the influence of the par...

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
  • Comparator with adjustable reference voltage
  • Comparator with adjustable reference voltage
  • Comparator with adjustable reference voltage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0024] figure 1 The schematic diagram of the pipeline ADC is shown. The comparator is one of the key modules in the pipeline ADC to convert from analog variables to digital variables. Generally, the pipeline ADC uses digital redundancy correction technology to alleviate the comparator The pressure of the offset voltage greatly simplifies the design of the comparator and reduces the power consumption of the circuit.

[0025] figure 2 Shown is the remainder transfer curve for a 2.5-bit pipelined ADC per stage. It can be seen from the figure that the judgment level of the comparator should be the fractional part of the reference level. An example is as follows: when the number of bits in each stage of the pipeline ADC is...

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 comparator with adjustable reference voltage, which is applied to sub digital-analog conversion module design in digital-analog conversion circuits in high-speed pipelines. Based on a traditional capacitive divider comparator with adjustable reference voltage, the invention proposes a pre-chargeable capacitive divider comparator to conveniently adjust the judgment threshold voltage of the comparator. Compared with a traditional capacitive divider comparator with adjustable reference voltage, the pre-chargeable structure reduces the judgment threshold level offset voltage of the comparator, and relieves a series of design difficulties caused by over high or over low judgment threshold voltage in traditional structure.

Description

technical field [0001] The invention relates to a comparator with adjustable reference voltage, which is mainly aimed at high-speed and high-precision analog-to-digital conversion circuits and analog front-end interface circuits of various modern communication and signal processing systems. Background technique [0002] The invention relates to a comparator with adjustable reference voltage, which is mainly aimed at high-speed and high-precision analog-to-digital conversion circuits and analog front-end interface circuits of various modern communication and signal processing systems. [0003] The rapid development of deep submicron integrated circuit technology and handheld mobile device industry has brought unprecedented prosperity to the global electronics market. Handheld mobile devices include handheld communication entertainment and portable medical equipment, etc., which have a very broad market potential and development prospects. Products with stronger functions and...

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): H03M1/34
Inventor 王晗叶青
Owner 北京中科微知识产权服务有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap