Analog to digital converter

A technology of analog-to-digital converters and digital codes, applied in the direction of analog-to-digital converters, analog/digital conversion calibration/testing, etc., to achieve the effect of maintaining high-speed characteristics, reducing power consumption, reducing branch current and power supply voltage

Inactive Publication Date: 2012-01-25
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The invention provides an analog-to-digital converter to solve the problems of speed and power consumption of the analog-to-digital converter with a traditional pipeline structure

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  • Analog to digital converter
  • Analog to digital converter
  • Analog to digital converter

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Embodiment Construction

[0039] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] In order to solve the problem that the speed and power consumption of traditional pipeline-type analog-to-digital converters cannot achieve good results at the same time, the present invention provides an analog-to-digital converter, which can maintain the pipeline under the condition of ultra-low power consumption. ADC high-speed characteristics.

[0041] The analog-to-digital converter of the present invention will be described in detail below through an embodiment.

[0042] refer to figure 1 , which shows the structure diagram of the traditional N-stage pipeline structure analog-to-digital converter described in the embodiment of the present invention.

[0043] The basic idea of ​​the pipeline structure is to evenly di...

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Abstract

The invention provides an analog to digital converter, which solves the problem of low speed and high power consumption of the conventional analog to digital converter with a production line type structure. The analog to digital converter comprises N levels of production line type structures which are connected with one another sequentially, wherein the first level and the second level adopt two-step flash structures, and the levels from 3 to N adopt the production line type structures; N is a positive integer more than 2; and an output of each level is output by a digital correction circuit and used as an output of the analog to digital converter. In the production line type structures, a subthreshold operational amplifier is adopted, so branch current and power supply voltage of a circuit can be reduced; therefore, the power consumption of the circuit is reduced and a design aim of ultralow power consumption can be fulfilled; meanwhile, the two-step flash structures are adopted, the high speed characteristic of the production line type analog to digital converter is retained under the condition of ultralow power consumption.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to an analog-to-digital converter. Background technique [0002] With the rapid development and popularization of digital technology, especially information technology, in the fields of modern control, communication and detection, in order to improve the performance index of the system, digital computer technology is widely used in signal processing. Since the actual objects of the system are often some analog quantities (such as temperature, pressure, displacement, image, etc.), in order for the computer or digital instrument to recognize and process these signals, these analog signals must first be converted into digital signals. In this way, a circuit that can act as a bridge between analog signals and digital signals - an analog-to-digital converter is needed. [0003] An analog-to-digital converter is an A / D converter, or ADC (Analog-to-Digital Converter) for short...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/12H03M1/10
Inventor 骆丽李治涛蔡晓伟
Owner BEIJING JIAOTONG UNIV
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