Current comparator with hysteresis function

A current comparator and functional technology, which is applied in the field of current comparators under integrated circuits, can solve the problems of output level inversion, peak current entrained noise sensitivity, and affecting judgment results, etc.

Active Publication Date: 2017-03-22
QIANDU TONGCHIP XIAMEN MICROELECTRONICS TECH CO LTD
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010]The purpose of the present invention is to solve the problem that the traditional current comparator adopts a unified threshold current, and because of the fast response speed, it is sensitive to th

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
  • Current comparator with hysteresis function
  • Current comparator with hysteresis function
  • Current comparator with hysteresis function

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0029] Specific implementation mode one: the following combination Figure 2 to Figure 4 Describe the working principle of the current comparator with hysteresis function.

[0030] In the description of the traditional current comparator circuit, because the current comparator is in the peak current I peak and threshold current I H A uniform threshold current is used for comparison, so the current comparator is sensitive to the peak current I peak Sensitivity to entrained noise will cause unwanted inversion of the output level. image 3 What is proposed is the current comparator with hysteresis function described in this embodiment, which solves the problem of being sensitive to spike current entrainment noise and causing unnecessary level inversion caused by the common current comparator adopting a unified threshold current.

[0031] image 3 The threshold current in the shown comparator is not a fixed value, and its magnitude is selected and switched to different values ...

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 current comparator with a hysteresis function, belongs to the technical field of the current comparator under an integrated circuit and solves the problem that according a traditional current comparator, a uniform threshold current is employed, a response speed is too fast, so the sensitivity to noise mixed up with a peak current is caused, unnecessary overturn occurs in an output level and a final judgment result is influenced is solved. The current comparator comprises a threshold current control unit 1, a phase inverter INV0, a phase inverter INV1, NMOS transistors MN1-MN5, NMOS transistors MN9-MN10, a PMOS transistor MP3 and a current source Ipeak _current. When the peak current is mixed up with the noise, according to the traditional current comparator, the level is overturned relatively fast, while according to the current comparator with the hysteresis function, a response to the change of the peak current is relatively slow. A current threshold value is adaptively switched each time after the level is overturned.

Description

technical field [0001] The invention belongs to the technical field of current comparators under integrated circuits. Background technique [0002] At the receiving end of the optical fiber communication integrated circuit, it is necessary to convert the optical signal into a current signal through a photodiode, and then convert the current signal into a voltage signal through a transimpedance amplifier. The performance requirements of the transimpedance amplifier are high bandwidth, low noise, medium gain and fast response speed, and its output signal mixed with noise will be passed to the high-gain limiting amplifier. In order to make the limiting amplifier amplify the electrical signal that meets the level standard, a judgment circuit for input signal noise is added to the limiting amplifier. The judgment circuit will include a current comparator to accurately judge whether the input is noise or meets the level standard. The electrical signal realizes the closing and ope...

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): H03K5/22
CPCH03K5/22Y02B70/10
Inventor 李景虎吴阳吉涂航辉陈福洁
Owner QIANDU TONGCHIP XIAMEN MICROELECTRONICS TECH CO LTD
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