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Analog-to-Digital Converter with Noise Reduction Feedback Path

A Feedback Path, Feedback Signal Technology

Inactive Publication Date: 2016-11-09
MARVELL WORLD TRADE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They may introduce distortion in the desired signal, or they may completely block the desired signal

Method used

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  • Analog-to-Digital Converter with Noise Reduction Feedback Path
  • Analog-to-Digital Converter with Noise Reduction Feedback Path
  • Analog-to-Digital Converter with Noise Reduction Feedback Path

Examples

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Embodiment Construction

[0023] In the following description, for purposes of explanation, numerous examples and specific details are set forth in order to provide a thorough understanding of the present disclosure. However, it will be apparent to those skilled in the art that the present disclosure, as defined by the claims, may include some or all of the features of these examples alone or in combination with other features described below. , and may also include modifications and equivalents of the features and concepts described herein.

[0024] Embodiments of an analog-to-digital converter (ADC) according to the principles of the present disclosure may be used in the baseband analog portion of a wireless receiver. For example, the baseband analog section in a software defined radio (SDR) can achieve component and power reduction while also enabling a reduced "footprint". Moving the ADC function closer to the antenna can also improve noise performance.

[0025] refer to Figure 1A , a high-leve...

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PUM

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Abstract

An analog-to-digital converter comprising a low-pass filter element, a quantizer, and a digital-to-analog converter are provided in the feedback path. The low-pass filter element is configured to filter the analog input signal. The quantizer is configured to receive an analog output signal based on a filtered analog input signal and converts the analog output signal into a digital output signal. Digital-to-analog converters are configured to generate analog feedback signals based on digital output signals, and selectively inject or absorb current associated with the feedback path to reduce the noise associated with digital-to-analog converters. The analog feedback signal is combined with the analog input signal at the input of the low-pass filter element.

Description

[0001] Cross References to Related Applications [0002] This disclosure is a continuation of U.S. Patent Application No. 13 / 310,587, filed December 2, 2011 (now U.S. Patent No. 8,581,762), which claims U.S. Provisional Application No. 61 / 419,625, the entire disclosure of the application cited above is incorporated herein by reference. Background technique [0003] The present disclosure relates to analog circuits, and more particularly to analog-to-digital conversion circuits. [0004] Unless otherwise indicated herein, the approaches described in this section are not prior art to the claims in this application and are not admitted to be prior art by inclusion in this section. [0005] A Software Defined Radio (SDR) system is a radio communication system in which elements (e.g. mixers, filters, amplifiers, modulator / demodulators, detectors, etc.) Refactored. A basic SDR system typically includes an antenna connected to a radio frequency (RF) front end. The output of this...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M3/00
CPCH03M3/344H03M3/368H03M3/424H03M3/454H03M3/456H03M1/06
Inventor A·利希迪尼G·甘多尔菲M·索希奥V·科洛纳R·卡斯特罗
Owner MARVELL WORLD TRADE LTD