Dynamic comparator

A dynamic comparator and dynamic technology, applied in the field of comparators, can solve problems such as limiting the application of CMOS comparators, not paying attention to the offset of the preamplifier, and affecting the accuracy of the comparators

Active Publication Date: 2012-08-22
昆山启达微电子有限公司
View PDF4 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are at least the following problems in the prior art: the general preamplified latch comparator only pays attention to reducing the kickback noise of the latch, but does not pay attenti

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
  • Dynamic comparator
  • Dynamic comparator
  • Dynamic comparator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0063] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0064] The specific implementation manner of the present invention is not limited to the following description, and will now be further described in conjunction with the accompanying drawings.

[0065] The invention provides a dynamic comparator applied to a high-speed and high-precision pipeline A / D (analog / digital) converter, which can effectively reduce the offset voltage of the dynamic comparator under the condition of high speed.

[0066] Such as figure 1 As shown, the first embodiment of the dynamic comparator of the present invention includes a sequentially connected preamplifier circuit 1, a dynamic latch circuit 2 and an output stage circuit 3, wherein,

[0067] The preamplifier circuit 1 includes a first-stage amplifying un...

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 dynamic comparator. The dynamic comparator comprises a pre-amplification circuit, a dynamic latch circuit and an output-stage circuit which are connected in sequence, wherein the pre-amplification circuit comprises a first-stage amplification unit adopting an input detuning storage technology and a second-stage amplification unit adopting an output detuning storage technology; the dynamic latch circuit is used for amplifying the output signal of the pre-amplification circuit, and transforming the amplified signal into a digital logical output level; the output-stage circuit is used for outputting the digital logical output level at a latched phase, and outputting logic zero at a rest phase. The dynamic comparator provided by the invention adopts a detuning canceling technology and a structure isolating kickback noise in the pre-amplification circuit, thus effectively reducing the input detuning voltage, and greatly meeting the demands for design of high speed and high precision analog-digital convertors.

Description

technical field [0001] The invention relates to a comparator, in particular to a dynamic comparator. Background technique [0002] The comparator is an important constituent unit of the pipeline A / D (analog / digital) converter, and its performance has an important influence on the pipeline A / D converter. With the development of the pipeline A / D converter towards high speed and high precision, the requirements for its internal sub-circuits, especially the comparator, are getting higher and higher. In the MDAC (multiplicative digital-to-analog converter) of the pipeline A / D converter, multiple internal comparators need to convert the input analog voltage signal of this stage into the logic level required by the subsequent circuit, and then through the D / A (digital / A) The converter converts the logic level signal into an analog voltage signal, and finally performs a subtraction operation to obtain the residual difference. Usually the propagation delay of the comparator occupi...

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 朱樟明吴红兵
Owner 昆山启达微电子有限公司
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