基于指数电流发生器的CMOS线性-in- db VGA

2011 6th International Conference on Design & Technology of Integrated Systems in Nanoscale Era (DTIS) Pub Date : 2011-04-06 DOI:10.1109/DTIS.2011.5941429

V. Kalenteridis, S. Vlassis, S. Siskos

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引用次数: 11

摘要

本文提出了一种简单的CMOS指数电流电路，能够以线性进db的方式控制可变增益放大器。所提出的实现是基于指数函数的泰勒级数近似。为了验证理论分析，在CMOS 90纳米技术下设计了一个简单的VGA架构。该近似实现了17dB线性范围，近似误差小于0.5dB，总体功耗小于300μW。

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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A CMOS linear-in-dB VGA based on exponential current generator

This paper proposes a simple CMOS exponential current circuit that is capable to control a Variable Gain Amplifier with a linear-in-dB manner. The proposed implementation is based on a Taylor's series approximation of the exponential function. A simple VGA architecture has been designed in a CMOS 90nm technology, in order to validate the theoretical analysis. The approximation achieves a 17dB linear range with less than 0.5dB approximation error, while the overall power consumption is less than 300μW.

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来源期刊

2011 6th International Conference on Design & Technology of Integrated Systems in Nanoscale Era (DTIS)

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