Analysis and design of Flash analog to digital converter for ultra wide band application

Piyush. V. Kanodiya, A. Naik
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引用次数: 8

Abstract

Ultra-Wideband (UWB) communication is a recent high speed wireless technology that uses sub-nano second pulses to transmit information. According to United States Federal Communications Commission (FCC), a UWB technology is a form of wireless communication in which signals occupy a wide bandwidth, greater than the lesser of 500MHz or 20% of the center frequency of the signal is consider as an ultra wide band signal. A high speed low/medium resolution Analog-to-Digital converter (ADC) is required for processing the UWB signal. Considering latency and conversion speed, the flash ADC is often the most preferred selection in high-speed communication applications. Therefore, a 5-bit Flash ADC with 500Msamples/s sampling rates has been analyzed and designed. This 5-bit Flash ADC requires 31 comparators, resistor ladder of 32 resistors and thermometer-to-binary code converter (TC-to-BC). This ADC consumes 13.64mw from 1.8V supply voltage at 500MS/s with total conversion time of 1.135ns. The simulations of all the designs are done in cadence UMC 0.18μm technology with a 1.8V power supply.
超宽带Flash模数转换器的分析与设计
超宽带(UWB)通信是近年来发展起来的一种利用亚纳秒脉冲传输信息的高速无线通信技术。根据美国联邦通信委员会(FCC)的定义,超宽带技术是一种无线通信形式,其中信号占用较宽的带宽,大于500MHz或信号中心频率的20%被认为是超宽带信号。处理超宽带信号需要高速低/中分辨率模数转换器(ADC)。考虑到延迟和转换速度,闪存ADC通常是高速通信应用的首选。因此,本文分析并设计了一个采样率为500m /s的5位Flash ADC。这个5位Flash ADC需要31个比较器,32个电阻的电阻梯和温度计-二进制代码转换器(tc - bc)。该ADC以500MS/s的速度在1.8V电源电压下消耗13.64mw,总转换时间为1.135ns。所有设计的仿真都是在1.8V电源下,采用UMC 0.18μm技术进行的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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