A new multi-valued current-mode adder based on negative-differential resistance using ULP diodes

Hassoune, Ilham; Drummond, Alexander; Gaudissart, Arnaud; Bol, David; Levacq, David; Flandre, Denis; Legat, Jean Didier

doi:10.1016/j.sse.2005.05.004

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…The forward current of this device is comparable to a standard diode (Levacq et al , 2004). Hassoune et al (2005) have also used the same diode to propose a multi-valued current-mode signed-digit adder.…”

Section: Proposed Approximate Full Addersmentioning

confidence: 99%

High-Performance CML approximate full adders for image processing application of laplace transform

Uoosefian

Navi

Mirzaee

et al. 2020

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Purpose The high demand for fast, energy-efficient, compact computational blocks in digital electronics has led the researchers to use approximate computing in applications where inaccuracy of outputs is tolerable. The purpose of this paper is to present two ultra-high-speed current-mode approximate full adders (FA) by using carbon nanotube field-effect transistors. Design/methodology/approach Instead of using threshold detectors, which are common elements in current-mode logic, diodes are used to stabilize voltage. Zener diodes and ultra-low-power diodes are used within the first and second proposed designs, respectively. This innovation eliminates threshold detectors from critical path and makes it shorter. Then, the new adders are employed in the image processing application of Laplace filter, which detects edges in an image. Findings Simulation results demonstrate very high-speed operation for the first and second proposed designs, which are, respectively, 44.7 per cent and 21.6 per cent faster than the next high-speed adder cell. In addition, they make a reasonable compromise between power-delay product (PDP) and other important evaluating factors in the context of approximate computing. They have very few transistors and very low total error distance. In addition, they do not propagate error to higher bit positions by generating output carry correctly. According to the investigations, up to four inexact FA can be used in the Laplace filter computations without a significant image quality loss. The employment of the first and second proposed designs results in 42.4 per cent and 32.2 per cent PDP reduction compared to when no approximate FA are used in an 8-bit ripple adder. Originality/value Two new current-mode inexact FA are presented. They use diodes as voltage regulators to design current-mode approximate full-adders with very short critical path for the first time.

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Section: Proposed Approximate Full Addersmentioning

confidence: 99%

High-Performance CML approximate full adders for image processing application of laplace transform

Uoosefian

Navi

Mirzaee

et al. 2020

View full text Add to dashboard Cite

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“…ULP diodes may present a region with negative impedance (2), which it is more pronounced when V TH,N <0 and V TH,P >0. Some circuits such as memory cells (2) and current mode adders (7) have been presented to take advantage of this region. Fig.…”

Section: Table I -P-channel Doping Concentration and V Thp @ 300kmentioning

confidence: 99%

Performance of Ultra-Low-Power SOI CMOS Diodes Operating at Low Temperatures

De Souza,

Rue,

Flandre

et al. 2011

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Two Novel Current-Mode CNFET-Based Full Adders Using ULPD as Voltage Regulator

Uoosefian

Navi

Mirzaee

et al. 2020

J CIRCUIT SYST COMP

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This paper presents two novel current-mode Full Adders based on Carbon Nanotube FET (CNFET). They comprise of three main parts: current-to-voltage converter, threshold detector and voltage-to-current converter. While other designs in the literature use either inverter or current source for detecting threshold, the new designs are based on a heuristic usage of an Ultra Low-Power Diode (ULPD) as voltage regulator. The use of diode does not lengthen the critical path and thereby ensuring high-speed operation. It does not increase power consumption significantly either. Simulation results by HSPICE and 32[Formula: see text]nm CNFET technology file demonstrate at least 19% higher performance in terms of energy consumption for the second proposed Full Adder compared to other traditional and state-of-the-art current-mode and mixed-mode designs.

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A new multi-valued current-mode adder based on negative-differential resistance using ULP diodes

Cited by 3 publications

References 8 publications

High-Performance CML approximate full adders for image processing application of laplace transform

High-Performance CML approximate full adders for image processing application of laplace transform

Performance of Ultra-Low-Power SOI CMOS Diodes Operating at Low Temperatures

Two Novel Current-Mode CNFET-Based Full Adders Using ULPD as Voltage Regulator

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