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A Track and Hold for Single-Ended or Differential Input with Adjustable Output Common Mode

机译:具有可调输出共模的单端或差分输入的轨道和保持

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摘要

A novel differential output track and hold (TH) circuit with configurable common-mode output voltage is presented. Its structure avoids the coupling circuits required when dealing with different common-mode levels in differential signals. Another novelty of the proposed design is its ability to track single-ended signals, and convert the output to a steady differential voltage, with a programmable common-mode level. The solution employs switched capacitors arrangement that is compatible with standard CMOS technology. Circuit simulations in a 90nm technology for both single-ended and differential input confirm the ability of convert and stabilize the output common mode (CM) levels. The main drawback is a small loss of output linearity (4.81dB and 2.72dB for single-ended and differential input, respectively).
机译:提出了一种具有可配置的共模输出电压的新型差分输出轨道和保持(TH)电路。其结构避免了在差分信号中处理不同的共模电平时所需的耦合电路。建议设计的另一个新颖性是其跟踪单端信号的能力,并将输出转换为稳定差分电压,具有可编程的共模电平。该解决方案采用与标准CMOS技术兼容的开关电容器装置。用于单端和差分输入的90nm技术中的电路模拟确认转换和稳定输出共模(CM)级别的能力。主要缺点是输出线性的损失(4.81dB和2.72dB,分别用于单端和差分输入)。

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