Abstract
Background: Main concern in efficient VLSI circuit designing is low-power consumption,
high-speed and noise tolerance capability.
Objective: In this paper, two efficient and high-performance topologies are proposed for cascaded
domino logic using carbon nanotube MOSFETs (CN-MOSFETs). The first topology is designed to
remove the intermediate charge sharing problem without any keeper circuit, whereas the second one
holds the true logic level of the evaluation phase without any voltage drop for next precharge phase.
The proposed topologies are suitable for cascading of the high-performance domino circuits.
Methods: The proposed domino circuits are tested and verified using Synopsys HSPICE simulator
with 32nm CN-MOSFET technology provided by Stanford University.
Conclusion: The power delay product of proposed DL-I and DL-II improves by 32.59 % and 40.98 %
for 8-input OR gate as compared to standard logic respectively at the clock frequency of 500 MHz.
The simulation results validate that the proposed circuits improve the performance of pseudo domino
logic with respect to leakage power consumption, delay and unity noise gain.
Keywords:
Dynamic logic, carbon nano-tubes, CN-MOSFET, keeper, stack, charge sharing.
Graphical Abstract
[1]
Kang, S.M.; Leblebici, Y.
CMOS Digital Integrated Circuits: Analysis and Design; Tata McGraw-Hill Publishing company Ltd:New Delhi,. , 2007.
[5]
Rabaey, J.M.; Chandrakasan, B.; Nicolic, B. Digital Integrated Circuits: A Design Perspective; Pearson Education: India, 2016.
[12]
Bansal, D.; Singh, B.P.; Kumar, A. Efficient keeper for pseudo domino logic. Int. J. Pure Appl. Math., 2017, 117, 605-612.
[14]
Anis, M.H.; Allam, M.W.; Elmasry, M.I. Energy-efficient noise-tolerant dynamic styles for scale-down CMOS and MTCMOS technologies. IEEE Trans. VLSI Syst., 2002, 10, 71-78.
[16]
Peiravi, A.; Asyaei, M. Robust low leakage controlled keeper by current-comparison for wide fan-in gates. IEEE Trans. VLSI Syst., 2012, 45, 22-32.
[18]
Palumbo, G.; Pennisi, M.; Alioto, M. A simple circuit approach to reduced delay variations in domino logic gates. IEEE Trans. Circ. Syst., 2012, 59, 2292-2300.
[22]
Kursun, V.; Friedman, E.G. Sleep switch dual threshold voltage domino logic with reduced standby leakage current. IEEE Trans. VLSI Syst., 2004, 12, 485-496.
[24]
Covino, J.J. Dynamic CMOS circuits with noise immunity. U.S.
Patent 5650733,. 1997.
[25]
Evans, D.A. Noise-tolerant dynamic circuits. US Patent 5793228,. 1998.
[26]
Iijima, S. Helical microtubules of graphitic carbon. Nature 354,, 1991, 6348(1), 56-58.
[35]
Sun, Y.; Kursun, V. Carbon nanotubes blowing new life into NP dynamic CMOS circuits. IEEE Trans. Circ. Syst., 2014, 61, 420-428.