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Frequency response analysis in electrical circuits provides vital insights into a circuit's behavior as the frequency of the input signal changes. The transfer function, a mathematical tool, is instrumental in understanding this behavior. It defines the relationship between phasor output and input and comes in four types: voltage gain, current gain, transfer impedance, and transfer admittance. The critical components of the transfer function are the poles and zeros.
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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Approximate Priority Hybrid 3DNoC Buffered-Bufferless Router.

Savvas Savva1, Konstantinos Tatas2, Costas Kyriacou2

  • 1Department of Electrical Engineering, Computer Engineering and Informatics, Frederick University, 1036 Nicosia, Cyprus.

Micromachines
|February 25, 2023
PubMed
Summary

This study presents a novel 3D network-on-chip (NoC) router combining buffered and bufferless designs. It achieves performance and area gains using approximate priority comparison for efficient flit deflection.

Keywords:
3D Networks-on-ChipNoCapproximate computingbufferless routing

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Area of Science:

  • Computer Architecture
  • Network-on-Chip (NoC) Design
  • VLSI Systems

Background:

  • Traditional NoC routers face trade-offs between buffering and bufferless approaches.
  • Optimizing router performance, area, and energy efficiency remains a key challenge in chip design.

Purpose of the Study:

  • To introduce a novel 3D NoC router architecture.
  • To combine the benefits of buffered and bufferless routing strategies.
  • To improve performance and reduce resource utilization through approximate priority comparison.

Main Methods:

  • A modified asymmetrical router design with dimension-specific buffering (buffered in z, bufferless in x/y).
  • Implementation of approximate priority comparison for flit deflection in x and y dimensions.
  • Experimental evaluation using synthetic and realistic traffic patterns.

Main Results:

  • The proposed router effectively merges advantages of both buffered and bufferless designs.
  • Achieved performance gains and reduced area due to simpler logic for approximate priority comparison.
  • Demonstrated higher saturation injection rates compared to purely bufferless routers.
  • Attained higher clock frequencies and reduced area due to a simpler permutation network.
  • Showcased energy efficiency improvements.

Conclusions:

  • The novel 3D NoC router offers a compelling balance of performance, area, and energy efficiency.
  • Approximate priority comparison is a viable technique for enhancing NoC router design.
  • The proposed architecture provides a scalable solution for modern integrated circuits.