Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 3

年份

2017 1

2015 1

2010 1

关键词

共振隧穿器件（RTD）；非相交分解算法；通用逻辑门；真值矩阵；函数综合算法 1

检索范围：

排序：展示方式：

基于RTD三变量通用逻辑门的函数综合算法 Article

Mao-qun YAO, Kai YANG, Ji-zhong SHEN, Cong-yuan XU

《信息与电子工程前沿（英文）》 2017年第18卷第10期页码 1654-1664 doi: 10.1631/FITEE.1601730

摘要：共振隧穿器件（resonant tunneling device, RTD）比传统电子器件CMOS具有更优秀的性能，极有可能成为下一代集成电路的电子器件。通用逻辑门因其强大的逻辑功能，成为数字电路的重要单元电路，而目前基于RTD通用逻辑门实现n变量逻辑函数的综合算法还很缺乏。本文基于RTD通用逻辑门，提出实现任意n变量逻辑函数的综合算法。首先，提出真值矩阵的概念，并提出一种运用真值矩阵将任意n变量逻辑函数分解成3变量子集函数的非相交分解算法；在上述工作基础上，提出用基于RTD通用阈值逻辑门（universal threshold logicgates, UTLG）、基于RTD三变量异或门XOR3和基于RTD三变量通用逻辑门ULG3实现n变量逻辑函数的综合算法。提出的综合算法规范、可程序化，可方便地用于设计基于RTD通用逻辑门的任意n变量逻辑函数电路。

关键词：共振隧穿器件（RTD）；非相交分解算法；通用逻辑门；真值矩阵；函数综合算法

HTML PDF 收藏

Design of a novel RTD-based three-variable universal logic gate

Mao-qun YAO,Kai YANG,Cong-yuan XU,Ji-zhong SHEN

《信息与电子工程前沿（英文）》 2015年第16卷第8期页码 694-699 doi: 10.1631/FITEE.1500102

摘要： Traditional CMOS technology faces some fundamental physical limitations. Therefore, it has become very important for the integrated circuit industry to continue to develop modern devices and new design methods. The threshold logic gate has attracted much attention because of its powerful logic function. The resonant tunneling diode (RTD) is well suited for implementing the threshold logic gate because of its high-speed switching capability, negative differential resistance (NDR) characteristic, and functional versatility. In this paper, based on the Reed-Muller (RM) algebraic system, a novel method is proposed to convert three-variable non-threshold functions to the XOR of multiple threshold functions, which is simple and has a programmable implementation. With this approach, all three-variable non-threshold functions can be presented by the XOR of two threshold functions, except for two special functions. On this basis, a novel three-variable universal logic gate (ULG3) is proposed, composed of two RTD-based universal threshold logic gates (UTLG) and an RTD-based three-variable XOR gate (XOR3). The ULG3 has a simple structure, and a simple method is presented to implement all three-variable functions using one ULG3. Thus, the proposed ULG3 provides a new efficient universal logic gate to implement RTD-based arbitrary -variable functions.

关键词： Resonant tunneling diode (RTD) Threshold logic gate Reed-Muller expansion Universal logic gate

HTML PDF 收藏

Residence time distribution and modeling of the liquid phase in an impinging stream reactor

Xingjun WANG, Xianhui HU, Lishun HU, Guangsuo YU, Fuchen WANG,

《化学科学与工程前沿（英文）》 2010年第4卷第3期页码 353-359 doi: 10.1007/s11705-009-0262-x

摘要： Based on some experimental investigations of liquid phase residence time distribution (RTD) in an impinging stream reactor, a two-dimensional plug-flow dispersion model for predicting the liquid phase RTD in the reactor was proposed. The calculation results of the model can be in good agreement with the experimental RTD under different operating conditions. The axial liquid dispersion coefficient increases monotonously with the increasing liquid flux, but is almost independent of gas flux. As the liquid flux and the gas flux increase, the liquid dispersion coefficient of center-to-wall decreases. The axial liquid dispersion coefficient is much larger than that of center-to-wall, which indicates that the liquid RTD is dominated mainly by axial liquid dispersion in the impinging stream reactor.

关键词： RTD liquid dispersion reactor liquid independent