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Cascaded Op Amps01:16

Cascaded Op Amps

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Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
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高一致性斜坡设计方法,用于低噪音的柱子水平读出链.

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  • 1Department of Electronics, Xi'an University of Technology, Xi'an 710048, China.

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概括
此摘要是机器生成的。

本研究引入了大型数组CMOS图像传感器 (CIS) 的自适应式坡道信号校准方案,显著减少坡道信号不一致性和列固定模式噪声 (CFPN),对芯片面积和功耗的影响最小.

关键词:
在CMOS图像传感器上.适应式坡道信号发生器适应式坡道信号发生器纠正道信号中不一致的错误.一个斜坡的ADC.

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科学领域:

  • 电气工程 电气工程
  • 半导体设备 半导体设备
  • 图像传感器 图像传感器

背景情况:

  • 大阵列CMOS图像传感器 (CIS) 中的寄生后端布线会导致坡道信号不一致.
  • 这种不一致性会影响传感器的性能,特别是在高分辨率应用中.

研究的目的:

  • 开发一个高精度的补偿技术,用于适应式坡道信号不一致性校准的大阵列CIS.
  • 为了减轻非理想因素对坡道信号一致性的影响.

主要方法:

  • 一个新的校准方案,结合了平均电压技术,自适应负反动态调整和数字相关性双采样.
  • 在使用55nm 1P4M CMOS工艺的8192 ((H) × 8192 ((V) 像素阵列CIS上实现.

主要成果:

  • 将坡道信号不一致性降低到0.4% LSB.
  • 柱固定模式噪声 (CFPN) 的降低为0.000037% (0.15 e-).
  • 芯片面积的最小增加 (0.6%) 和功耗的最小增加 (0.5%).

结论:

  • 拟议的自适应式坡道信号校准方案有效地解决了大型阵列CIS中的坡道信号不一致问题.
  • 这项技术为提高高分辨率传感器图像质量的实际解决方案.