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Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
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Reutilización de no idealidades de Si CMOS para el procesamiento de imágenes estocástico y analógico

Been Kwak1, Ryun-Han Koo2, Changhyeon Han1

  • 1Department of Electrical Engineering, Hanyang University, Seoul 04763, Republic of Korea.

Science advances
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PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores reutilizaron no idealidades de dispositivos semiconductores, como el ruido de generación-recombinación y la resistencia negativa diferencial, en recursos funcionales para la computación analógica estocástica avanzada. Este enfoque de dispositivo único permite la computación multifuncional utilizando la tecnología CMOS existente.

Palabras clave:
ruido de generación-recombinaciónresistencia negativa diferencialtransistores CMOScomputación analógica estocásticadispositivo únicotecnología CMOS

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Área de la Ciencia:

  • Física de Dispositivos Semiconductores
  • Arquitecturas de Computación Analógica
  • Ciencia de Materiales

Sus antecedentes:

  • Las no idealidades intrínsecas del dispositivo generalmente se minimizan en la ingeniería de semiconductores convencional.
  • Se ha prestado limitada atención al ruido de generación-recombinación (G-R) y a la resistencia negativa diferencial (NDR) inducida por ionización de impacto en comparación con el ruido 1/f.

Objetivo del estudio:

  • Demostrar la reutilización estratégica de las no idealidades del dispositivo para la computación analógica estocástica avanzada.
  • Aprovechar el ruido G-R y la NDR para la computación analógica multifuncional a nivel de dispositivo único.

Principales métodos:

  • Se explotó el ruido G-R inducido por trampas de canal de nivel profundo y la NDR inducida por ionización de impacto en la corriente de cuerpo.
  • Se utilizaron transistores de silicio sobre aislante totalmente agotados fabricados en el proceso industrial de semiconductores complementarios de óxido metálico (CMOS).
  • Se logró una computación multifuncional reconfigurando las condiciones de polarización aplicadas.

Principales resultados:

  • Demostró ruido G-R con correlación temporal controlable.
  • Se logró NDR con una relación pico-valle sin precedentes (2.78 × 10^4).
  • Los transistores individuales realizaron cifrado estocástico, lectura de señales determinista e inversión analógica.

Conclusiones:

  • Reveló un potencial computacional no reconocido dentro de las tecnologías CMOS maduras.
  • Presentó una alternativa escalable y energéticamente eficiente a las arquitecturas basadas en materiales exóticos.
  • Sentó las bases para los sistemas de computación analógica de próxima generación.