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The Power of Interstimulus Interval for the Assessment of Temporal Processing in Rodents
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Sampling time effects in the ACT device.

E G Bogus1, M J Hoskins, B J Hunsinger

  • 1Coordinated Sci. Lab., Illinois Univ., Urbana, IL.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|January 1, 1991
PubMed
Summary

This study demonstrates signal-dependent sampling in acoustic charge transport (ACT) devices. Key parameters like gate voltage and wave amplitude control sampling intervals, impacting device performance and distortion.

Area of Science:

  • Physics
  • Electrical Engineering
  • Materials Science

Background:

  • Acoustic charge transport (ACT) devices are semiconductor devices that utilize acoustic waves to transport charge.
  • Understanding and controlling the sampling process in ACT devices is crucial for their efficient operation and signal processing applications.

Purpose of the Study:

  • To demonstrate and analyze the signal-dependent sampling process in acoustic charge transport (ACT) devices.
  • To investigate the influence of gate voltage, wave amplitude, and transport depth on the sampling interval.
  • To analyze sampling distortion and compute channel-current-intercept values.

Main Methods:

  • Theoretical calculations of sampling intervals.
  • Experimental measurements of sampling intervals under varying conditions.

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  • Analysis of signal distortion caused by nonuniform sampling.

    • Main Results:

    • Demonstrated signal-dependent sampling in ACT devices.
    • Showed that gate voltage, wave amplitude, and transport depth directly affect the sampling interval.
    • Found that decreasing gate voltage and transport depth, and increasing wave amplitude, reduce sampling time delay for a fixed current.

    Conclusions:

    • The sampling process in ACT devices is inherently signal-dependent.
    • Precise control over sampling intervals can be achieved by adjusting gate voltage, wave amplitude, and transport depth.
    • Analysis of distortion and channel-current-intercept provides insights into ACT device performance limitations.