改善辐照加固设计流水线型模数转换器性能的抖动电路技术

提出了一种能够改善高精度辐照加固设计流水线型模数转换器（ADC）动态性能指标的减式抖动电路技术.其中，基于深度伪随机数生成器所产生的伪随机数来驱动高精度数模转换器而生成所需的抖动信号，将抖动信号与ADC的输入信号相加输送给ADC进行量化，并将抖动信号从ADC量化输出中减去，以降低ADC的信噪

Dither Circuit to Improve Performance for a Radiation Hardening by Design Pipeline Analog to Digital Converter

A subtractive dither technology to improve performance for a high-resolution radiation hardening by design pipeline analog-to-digital converter was proposed. The dither signal generation is based on a deep multi-bits pseudo-random number generator driving a 5-bit high-resolution digital to analogue conversion (DAC). This dither signal is added with analog to digital converter (ADC) input signal, sampled, quantized and then digitally subtracted from the ADC output, thereby causing no significant degradation signal noise ratio (SNR). The measured results show that the proposed dither technology can efficiently improve static and dynamic performance of the ADC, especially when the ADC quantizes a small-signal input.