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Quantizer

A technology of quantizers and converters, applied in the direction of analog conversion, electrical components, code conversion, etc., can solve the problems of long delay, reduced time margin, and inapplicability, and achieve the effect of low delay and circuit complexity

Active Publication Date: 2017-12-12
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, additional digital circuitry inevitably introduces longer delays, resulting in reduced excess loop delay (ELD) timing margins
Therefore, these techniques are not suitable for high-speed CTDSM with strict ELD time margin requirements

Method used

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Embodiment Construction

[0032] Certain terms are used in the description and claims to refer to particular elements. Those skilled in the art should understand that a manufacturer may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" and "comprising" mentioned throughout the description and claims are open-ended terms, so they should be interpreted as "including but not limited to...". Otherwise, the term "coupled" includes any direct and indirect means of electrical connection. Therefore, if it is described herein that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0033] figure 1 is a schematic diagram of a conti...

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Abstract

An exemplary quantizer includes a multi-bit analog-to-digital converter, ADC, and a first digital-to-analog converter, DAC, feedback circuit. The multi-bit ADC has an internal DAC associated with comparison of each sampled analog input of the multi-bit ADC. The multi-bit ADC converts a currently-sampled analog input into a first digital output. A first noise-shaped truncation output is derived from the first digital output. The first DAC feedback circuit transfers a first truncation residue associated with the first noise-shaped truncation output to the internal DAC. The transferred first truncation residue is reflected in comparison of a later-sampled analog input of the multi-bit ADC via the internal DAC.

Description

【Technical field】 [0001] The present invention relates to a quantizer design and, more particularly, to an analog-to-digital converter with embedded noise-shaping truncation, embedded noise-shaping partitioning, and / or embedded hyperloop delay compensation. -digital converter, ADC). 【Background technique】 [0002] Analog technology has dominated signal processing for many years, but digital technology is slowly infiltrating the field. An analog-to-digital converter (ADC) is required to convert the analog signal to digital, allowing the signal to be processed in the digital domain. Analog-to-digital converters are used in a variety of applications. For example, a continuous-time delta-sigma modulator (CTDSM) has a quantizer implemented using an analog-to-digital converter. Typically, the core of the CTDSM is responsible for digitizing the analog input signal and reducing noise at lower frequencies. At this stage, the architecture implements a function known as noise shapi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M3/00
CPCH03M3/322H03M3/458H03M3/338H03M3/37H03M3/412H03M3/426H03M1/1245H03M1/466H03M3/424
Inventor 蔡任桓楼志宏
Owner MEDIATEK INC