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A Capacitive ThresholdLogic Gate
, 1996
"... A dense and fast thresholdlogic gate with a very high fanin capacity is described. The gate performs sumofproduct and thresholding operations in an architecture comprising a polytopoly capacitor array and an inverter chain. The Boolean function performed by the gate is soft programmable. This i ..."
Abstract

Cited by 26 (2 self)
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A dense and fast thresholdlogic gate with a very high fanin capacity is described. The gate performs sumofproduct and thresholding operations in an architecture comprising a polytopoly capacitor array and an inverter chain. The Boolean function performed by the gate is soft programmable. This is accomplished by adjusting the threshold with a dc voltage. Essentially, the operation is dynamic and thus, requires periodic reset. However, the gate can evaluate multiple input vectors in between two successive reset phases because evaluation is nondestructive. Asynchronous operation is, therefore, possible. The paper presents an electrical analysis of the gate, identifies its limitations, and describes a test chip containing four different gates of fanin 30, 62, 127, and 255. Experimental results confirming proper functionality in all these gates are given, and applications in arithmetic and logic function blocks are described. I. INTRODUCTION T HRESHOLD logic (TL) originally emerged ...
VLSI Implementations of Threshold Logic  A Comprehensive Survey
 IEEE TRANS. NEURAL NETWORKS
, 2003
"... This paper is an indepth review on silicon implementations of threshold logic gates that covers several decades. In this paper, we will mention early MOS threshold logic solutions and detail numerous verylargescale integration (VLSI) implementations including capacitive (switched capacitor and fl ..."
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Cited by 14 (5 self)
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This paper is an indepth review on silicon implementations of threshold logic gates that covers several decades. In this paper, we will mention early MOS threshold logic solutions and detail numerous verylargescale integration (VLSI) implementations including capacitive (switched capacitor and floating gate with their variations), conductance/current (pseudonMOS and outputwiredinverters, including a plethora of solutions evolved from them), as well as many differential solutions. At the end, we will briefly mention other implementations, e.g., based on negative resistance devices and on single electron technologies.
Implementation of Threshold Logic
, 1998
"... Traditionally, logic circuits have been, and are still being implemented using Boolean logic. Although there has been a tremendous increase in the performance of the technology used to implement Boolean logic primitives, the underlying paradigm has remained unchanged over the years. Since the ear ..."
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Cited by 3 (1 self)
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Traditionally, logic circuits have been, and are still being implemented using Boolean logic. Although there has been a tremendous increase in the performance of the technology used to implement Boolean logic primitives, the underlying paradigm has remained unchanged over the years. Since the early 1960's there is a fundamentally more powerful alternative for Boolean logic available, called Threshold Logic (TL). Although implementations of TL gates have grown with the advances in technology, none of these have ever proven widely applicable. Because of this TL was never a practical success. Recently a new technology called Capacitive Threshold Logic (CTL) was disclosed which holds the promise of being the first practically applicable TL technology. This thesis investigates the issues related to the application of CTL, and particularly to the implementation of arithmetic operations. It starts with a very general introduction into TL. After this it deals with a number of probl...
Threshold Logic
, 1999
"... sign style lies in the intrinsic complex functions implemented by such gates, which allow system realizations that require less threshold gates or gate levels than a design with standard logic gates. More recently, there is an increasing interest in threshold logic because a number of theoretical re ..."
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Cited by 3 (1 self)
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sign style lies in the intrinsic complex functions implemented by such gates, which allow system realizations that require less threshold gates or gate levels than a design with standard logic gates. More recently, there is an increasing interest in threshold logic because a number of theoretical results show that polynomial size, bounded level networks of threshold gates can implement functions that require unbounded level networks of standard logic gates. In particular, important functions like multipleaddition, multiplication, division, or sorting can be implemented by polynomialsize threshold circuits of small constant depth. Threshold gate networks have been found also useful in modelling nerve nets and brain organization, and with variable threshold (or weights) values they have been used to model learning systems, adaptive systems, selfrepairing systems, pattern recognition systems, etc. Also, the study of algorithms for the synthesis of threshold gate networks is important in