Low Power and Low Latency Phase-‎Frequency Detector in Quantum-Dot ‎Cellular Automata Nanotechnology

Document Type : Research Paper

Authors

1 Department of Electical and Computer Engineering, Mazandaran Institute of Technology, ‎Babol, Iran.‎

2 Faculty of Engineering and Technology, University of Mazandaran, Babolsar, Iran.‎

3 Department of Electronic, Semnan Branch, Islamic Azad University, Semnan, Iran.‎

Abstract

   Nowadays, one of the most important blocks in telecommunication circuits is the frequency synthesizer and the frequency multipliers. Phase-frequency detectors are the inseparable parts of these circuits. In this paper, it has been attempted to design two new structures for phase-frequency detectors in QCA nanotechnology. The proposed structures have the capability of detecting the phase differences of the rising edge or falling edge of their inputs. Also, it can detects frequency differences of its two inputs. In the design of proposed PFDs D flip-flop with few number of cells, area and low delay is used. The proposed PFD circuits in QCA technology have 159 quantum cells, 0.2 µm2 of occupied area, and 1 clock cycle delay for reset path. In comparison to the previous PFD in QCA technology, the proposed designs have ability to detect phase differences more than half of the period of reference signal. That means the capture range of them are approximately 4π (between -2π to 2π). Also, the power simulation of the proposed structures of phase-frequency detector is presented in this paper.

Keywords

References

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International Journal of Nanoscience and Nanotechnology
Volume 16, Issue 3
August 2020
Pages 145-152

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