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Set-reset latch logic operation in a bistable system under suprathreshold and subthreshold signals.

Rong Gui1, Huiyu Zhang1, Guanghui Cheng2

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Area of Science:

  • Computer Engineering
  • Nonlinear Dynamics
  • Signal Processing

Background:

  • Set-reset latches are fundamental components for state storage in computing.
  • Understanding input signal dynamics is crucial for reliable latch operation.

Purpose of the Study:

  • To investigate the influence of suprathreshold and subthreshold input signals on set-reset latch logic.
  • To explore methods for enhancing the operational parameter region of set-reset latches.

Main Methods:

  • Analysis of bistable systems under different logical input signal types.
  • Investigating the effects of single harmonic and biharmonic inputs.
  • Utilizing dynamic bias analysis to explain system behavior.
  • Verification through circuit simulations and hardware implementation.

Main Results:

  • Suprathreshold signals enable reliable set-reset latch operation with inherent anti-interference capabilities.
  • Subthreshold signals can induce operation with a single harmonic but require a narrow parameter range.
  • Biharmonic-induced logical vibrational resonance significantly expands the optimal parameter region for subthreshold signals.

Conclusions:

  • Input signal characteristics critically determine set-reset latch reliability.
  • Logical vibrational resonance offers a robust method to improve latch operation under subthreshold conditions.
  • The findings are validated by both simulation and physical hardware circuits.