Fully digital Sigma-Delta modulator based on phase inverter

An inverter, all-digital technology, used in analog conversion, electrical components, code conversion, etc., can solve problems such as high power consumption, slow comparator response speed, and reduced signal dynamic range, achieving low power consumption, high Effect of Current Utilization Efficiency

Active Publication Date: 2015-09-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. Under the deep submicron technology, the gain of traditional OTA becomes smaller, the noise performance becomes worse, the signal dynamic range decreases, the power consumption increases, it is diffi...

Method used

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  • Fully digital Sigma-Delta modulator based on phase inverter
  • Fully digital Sigma-Delta modulator based on phase inverter
  • Fully digital Sigma-Delta modulator based on phase inverter

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Embodiment Construction

[0025] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0026] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or e...

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Abstract

The present invention discloses a fully digital Sigma-Delta modulator based on a phase inverter. The fully digital Sigma-Delta modulator comprises two integrators based on digital phase inverters which stabilize a working point under the effect of the auto-zero technology to realize feedback function in the integral process, a comparator based on a phase inverter which stabilizes a working point under the effect of the auto-zero technology to realize a high precision low power consumption voltage comparison function, and a feedback control logic formed by D latches and a gate circuit. The fully digital Sigma-Delta modulator can work normally under extremely low power supply voltage, the current utilization efficiency is high, and the power consumption is extremely low. A traditional amplifier is not used, however a digital module is used to carry out analog circuit design, the problems of small dynamic range, insufficient intrinsic gain, noise degradation and the like in the voltage design can be avoided, and the fully digital Sigma-Delta modulator is in accordance with the fully digital design trend of an analog-digital converter.

Description

technical field [0001] The invention relates to the technical field of analog integrated circuits, in particular to an all-digital module Sigma-Delta modulator realized based on an inverter. Background technique [0002] Since the new century, deep submicron mixed-signal integrated circuit technology has developed rapidly, and has been widely used in portable electronic devices such as MP3, digital cameras, car navigators, and smart phones. And users have higher and higher requirements for these electronic products: there must be a fast-response high-performance gaming experience, high-resolution display, fast web browsing like a computer desktop, and a convenient and easy-to-use user interface. Lower power consumption to increase battery life, and integrate more diverse functions on the same device. The trend in the mobile device market is larger screens and higher resolution displays, while the requirements for chip products are higher technology levels, better design sol...

Claims

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Application Information

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IPC IPC(8): H03M3/00
Inventor 方华军凌童向志鹏许军王敬梁仁荣
Owner TSINGHUA UNIV
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