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Upsampling01:22

Upsampling

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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...
261
Aliasing01:18

Aliasing

159
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
159

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Advancements in Active-Pixel-Type CMOS Image Sensor Design Techniques and Architectures for Wide Dynamic Range.

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Correction: Jun, J. A Comprehensive Methodology for Optimizing Read-Out Timing and Reference DAC Offset in High Frame Rate Image Sensing Systems. <i>Sensors</i> 2023, <i>23</i>, 7048.

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Updated: Jul 18, 2025

Bringing the Visible Universe into Focus with Robo-AO
10:35

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Published on: February 12, 2013

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一个全面的方法来优化读出时间和参考DAC在高率图像传感系统中的偏移.

Jaehoon Jun1

  • 1Department of Electrical Engineering, Inha University, Incheon 22212, Republic of Korea.

Sensors (Basel, Switzerland)
|August 26, 2023
PubMed
概括

本研究介绍了对具有模拟数字转换器 (ADC) 的节能图像传感器的时间优化. 该方法可以减少放大器阵列的功耗,同时保持高级成像应用的高性能.

科学领域:

  • 电气工程 电气工程
  • 计算机工程 计算机工程
  • 图像传感器技术图像传感器技术

背景情况:

  • 高分辨率的图像传感器对于先进的成像技术至关重要.
  • 放大器阵列的功耗是一个重大挑战.
  • 柱平行单坡模拟数字转换器 (ADC) 广泛使用.

研究的目的:

  • 为节能高分辨率图像传感器开发一个时间优化方法.
  • 为了最大限度地减少放大器阵列的功耗,而不会影响性能.
  • 为了提高各种应用的图像传感器的能源效率.

主要方法:

  • 优化读出时间,考虑ADC决策时间,转移率和结算时间.
  • 调整比较器的坡道参考偏移和放大器带宽.
  • 实现和验证一个108MP的3D堆叠CMOS图像传感器与一个10位ADC阵列.

主要成果:

  • 实现了1.4 e-rms的随机噪声和66 ppm的列固定模式噪声.
  • 证明了0.71e-·nJ的功绩指数 (FoM).
  • 验证了一行读出时间为6.9μs,放大器带宽为1.1MHz.
关键词:
在ADC的决定时机上.高率的高率.高分辨率的高分辨率解决方案图像传感器 图像传感器 图像传感器功率效率 功率效率 功率效率 功率效率露台参考偏移偏移的情况读出时间优化,读出时间优化.

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结论:

  • 提出的时间优化方法大大提高了高分辨率图像传感器的能源效率.
  • 这种方法可以实现更高的率和更好的系统性能在电力敏感的应用程序.
  • 该方法可适应各种需要优化性能和降低功耗的成像应用.