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Digital electronics

About: Digital electronics is a research topic. Over the lifetime, 10354 publications have been published within this topic receiving 153532 citations.


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Journal ArticleDOI
I.S. Hwang1, A.L. Fisher1
TL;DR: Two 32-bit CMOS adders have been developed, providing area and speed improvements of 1.5* and 1.7* over the combination of the domino and conventional CLA techniques.
Abstract: A dynamic CMOS logic style, called multioutput domino logic (MODL), has been developed. In this logic style, single logic gates produce multiple functions, and a circuit's device count can be reduced by a factor of more than 2, depending on the degree of recurrence in the circuit. In addition, MODL circuits are, by construction, considerably more stable than other dynamic circuits including conventional domino. A 32-bit carry lookahead (CLA) structure which reduces the adder's worst-case path by two logic stages has also been devised. This CLA structure has been developed to effectively utilize the advantages of MODL. Taken together, these developments have resulted in two 32-bit CMOS adders, providing area and speed improvements of 1.5* and 1.7* over the combination of the domino and conventional CLA techniques. Both adders have been fabricated in a standard 0.9- mu m two-level metal CMOS technology, and measured results show that the straight adder has achieved 32-bit addition times of less than 3.1 ns at 25 degrees C with V/sub DD/+5.0 V. >

91 citations

Proceedings ArticleDOI
02 Jun 2013
TL;DR: This paper presents a systemic way of automatically deriving word-level structures from the gate-level netlist of a digital circuit and provides the possibility for a user to specify sequences of word- level operations and it can extract the collection of gates corresponding to those operations.
Abstract: Systems are increasingly being constructed from off-the-shelf components acquired through a globally distributed and untrusted supply chain. Often only post-synthesis gate-level netlists or actual silicons are available for security inspection. This makes reasoning about hardware trojans particularly challenging given the enormous scale of the problem. Currently, there is no mature methodology that can provide visibility into a bit-level design in terms of high-level components to allow more comprehensive analysis. In this paper, we present a systemic way of automatically deriving word-level structures from the gate-level netlist of a digital circuit. Our framework also provides the possibility for a user to specify sequences of word-level operations and it can extract the collection of gates corresponding to those operations. We demonstrate the effectiveness of our approach on a system-on-a-chip (SoC) design consisting of approximately 400,000 IBM 12SOI cells and several open-source designs.

91 citations

Journal ArticleDOI
30 Jan 2013-Nature
TL;DR: A device showing a strong diode characteristic that is highly sensitive to both the sign and the magnitude of an external magnetic field, offering a reversible change between two different characteristic states by the application of a magnetic field is reported.
Abstract: Logic devices based on magnetism show promise for increasing computational efficiency while decreasing consumed power. They offer zero quiescent power and yet combine novel functions such as programmable logic operation and non-volatile built-in memory. However, practical efforts to adapt a magnetic device to logic suffer from a low signal-to-noise ratio and other performance attributes that are not adequate for logic gates. Rather than exploiting magnetoresistive effects that result from spin-dependent transport of carriers, we have approached the development of a magnetic logic device in a different way: we use the phenomenon of large magnetoresistance found in non-magnetic semiconductors in high electric fields. Here we report a device showing a strong diode characteristic that is highly sensitive to both the sign and the magnitude of an external magnetic field, offering a reversible change between two different characteristic states by the application of a magnetic field. This feature results from magnetic control of carrier generation and recombination in an InSb p-n bilayer channel. Simple circuits combining such elementary devices are fabricated and tested, and Boolean logic functions including AND, OR, NAND and NOR are performed. They are programmed dynamically by external electric or magnetic signals, demonstrating magnetic-field-controlled semiconductor reconfigurable logic at room temperature. This magnetic technology permits a new kind of spintronic device, characterized as a current switch rather than a voltage switch, and provides a simple and compact platform for non-volatile reconfigurable logic devices.

91 citations

Proceedings ArticleDOI
24 May 1993
TL;DR: An algorithm for mapping multiple-valued functions to such an array is presented and it works in the functional domain and does not require the synthesis and optimization of a conventional network prior to technology mapping.
Abstract: A brief overview of past progress in multiple-valued logic design is presented. The methods are considered with respect to the likely development of multiple-valued field programmable gate arrays. Look-up table based arrays are considered in some detail and an algorithm for mapping multiple-valued functions to such an array is presented. This algorithm uses reduced order multiple-valued decision diagrams, an extension of R.E. Bryant's (1986) well-studied structure for binary functions. The algorithm works in the functional domain and does not require the synthesis and optimization of a conventional network prior to technology mapping. >

91 citations

Journal ArticleDOI
TL;DR: This work maps with high resolution and dimensionality the bifurcation diagrams of two synthetic, out-of-equilibrium and nonlinear programs: a bistable DNA switch and a predator-prey DNA oscillator, and indicates interference from enzymatic coupling.
Abstract: Analog molecular circuits can exploit the nonlinear nature of biochemical reaction networks to compute low-precision outputs with fewer resources than digital circuits. This analog computation is similar to that employed by gene-regulation networks. Although digital systems have a tractable link between structure and function, the nonlinear and continuous nature of analog circuits yields an intricate functional landscape, which makes their design counter-intuitive, their characterization laborious and their analysis delicate. Here, using droplet-based microfluidics, we map with high resolution and dimensionality the bifurcation diagrams of two synthetic, out-of-equilibrium and nonlinear programs: a bistable DNA switch and a predator-prey DNA oscillator. The diagrams delineate where function is optimal, dynamics bifurcates and models fail. Inverse problem solving on these large-scale data sets indicates interference from enzymatic coupling. Additionally, data mining exposes the presence of rare, stochastically bursting oscillators near deterministic bifurcations.

90 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202369
2022156
2021171
2020255
2019255
2018250