Digitally-compatible ring oscillator frequency driven tuning of CN-TFT amplifiers: Performance compensation under statistical and morphological variations

2015 IEEE 20th International Mixed-Signals Testing Workshop (IMSTW) Pub Date : 2015-06-24 DOI:10.1109/IMS3TW.2015.7177860

Suvadeep Banerjee, M. Gupta, A. Banerjee, Satish Kumar, A. Chatterjee

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引用次数: 1

Abstract

Carbon Nanotube network based Thin-Film Transistors (CN-TFTs) are excellent candidates for next generation flexible electronics applications. However CN-TFT circuits suffer from imperfections due to morphological variations of fabricated carbon nanotube geometries that cause wide performance variations in analog amplifiers built from these CN-TFTs. Improved fabrication methods and sophisticated process control techniques are not sufficient for tackling these imperfections. In this paper, a new digitally-compatible tuning method is proposed for CN-TFT based amplifier designs. The amplifier is placed in a ring-oscillator configuration using two additional digital inverters, appropriately modified to allow oscillation of the inverter-inverting amplifier-inverter configuration. The frequency of oscillation is then used to drive a tuning algorithm that recovers the performance of the amplifier under statistical and morphological fabrication process variations. The method is very easy to implement and simulation studies show excellent results.

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CN-TFT放大器的数字兼容环振荡器频率驱动调谐:统计和形态变化下的性能补偿

基于碳纳米管网络的薄膜晶体管(CN-TFTs)是下一代柔性电子应用的优秀候选者。然而，由于制造的碳纳米管几何形状的形态学变化，导致由这些CN-TFT构建的模拟放大器的性能变化很大，因此CN-TFT电路存在缺陷。改进的制造方法和复杂的过程控制技术不足以解决这些缺陷。本文提出了一种新的数字兼容调谐方法，用于基于CN-TFT的放大器设计。放大器使用两个额外的数字逆变器放置在环形振荡器配置中，适当修改以允许逆变器-反相放大器-逆变器配置的振荡。然后使用振荡频率来驱动调谐算法，该算法可以恢复放大器在统计和形态制造过程变化下的性能。该方法易于实现，仿真研究显示了良好的效果。

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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来源期刊

2015 IEEE 20th International Mixed-Signals Testing Workshop (IMSTW)

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