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A new correlation method for high sensitivity current noise measurements.

Carmine Ciofi1, Graziella Scandurra, Rosario Merlino

  • 1Dipartimento di Fisica della Materia e Tecnologie Fisiche Avanzate, Universita degli Studi di Messina, Salita Sperone 31, 98166 Messina, Italy.

The Review of Scientific Instruments
|December 7, 2007
PubMed
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This summary is machine-generated.

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This study introduces a high-sensitivity current noise measurement technique using a differential transconductance amplifier. The method minimizes amplifier noise and enables impedance evaluation of the device under test.

Area of Science:

  • Electrical Engineering
  • Measurement Science
  • Physics

Background:

  • Accurate current noise measurements are crucial for characterizing electronic devices.
  • Traditional methods often face limitations due to inherent noise from measurement instrumentation.

Purpose of the Study:

  • To develop a highly sensitive current noise measurement system.
  • To virtually eliminate noise contributions from the transresistance amplifier.
  • To enable impedance evaluation of a device under test using noise data.

Main Methods:

  • Utilizing a differential transconductance amplifier.
  • Coupling the amplifier with a four-channel measurement system.
  • Exploiting amplifier properties to minimize noise contributions.

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Main Results:

  • Achieved very high sensitivity in current noise measurements.
  • Demonstrated virtual elimination of noise from active and passive amplifier components.
  • Successfully evaluated the impedance of a device under test from noise data.

Conclusions:

  • The proposed measurement approach significantly enhances sensitivity in current noise measurements.
  • The technique effectively isolates device noise and provides impedance information.
  • Experimental results validate the proposed method's effectiveness.