Different techniques, such as return-to-zero DAC, ISI-shaping or calibration, were proposed in literature to tackle ISI in CT-ΔΣM. This paper investigates the effect of ISI in the outermost feedback digital-to-analog converter (DAC) for three different DAC structures; a single-bit DAC (SB), a multi-bit DAC (MB) and a FIR DAC.

2011年10月3日 · Abstract: A new digital signal processing approach to shaping intersymbol interference (ISI) and static mismatch errors simultaneously in oversampled multi-level digital to analog converters (DAC) has recently been proposed. In this paper, a mathematical framework is established for analyzing ISI errors as well as comparing the ISI ...

This paper addresses this problem by proposing, analyzing, and experimentally demonstrating a low-cost add-on technique, called ISI scrambling, that, in conjunction with DEM, causes a DAC’s ISI to be free of nonlinear distortion. The ISI scrambling technique is demonstrated in a 1-GS/s, 14-bit DEM DAC implemented in 90 nm CMOS technology.

the ISI error is proportional to the DAC switching activity. Most DEM techniques increase the DAC element transition rate in order to scramble more effectively the DAC element selection pattern techniques [1]–[7]. In particular, the popular DWA technique …

2022年11月27日 · 2、 DAC的建立时间仍会随着初始代码和最终代码的不同而变化,导致产生“码间 干扰” (ISI)，这个问题可以通过更复杂的开关技术来解决。 MT-014 (ADI) 高速高精度 2.5GSPs 14bits DAC setting time（建立时间）如何缩减? ,EETOP 创芯网论坛 (原名：电子顶级开发网)

2018年11月12日 · 在ofdm系统中，多径效应会引起符号间干扰（isi）和频率选择性衰落。当信号的某一部分由于多径效应而发生时间延迟，造成其重叠在下一个个符号的周期内，就会产生isi，这将导致系统性能急剧下降。为了避免isi，ofdm...

滤波器的振铃响应可能持续很久， 以致影响到随后的符号，并产生码间串扰 (isi)。 ISI 定义为前后符号的多余能量干扰到当前的符号，导致接错误地解码。

2024年1月16日 · 数字音频DAC(数－模转换)就是将离散的数字量转换为连接变化的模拟量，实现该功能的电路或器件称为数模转换电路，通常称为d/a转换器(digital analog converter)或DAC。

2023年8月21日 · 符号间干扰 (isi) 通常会限制高速连续时间数模转换器 (dac)（例如奈奎斯特速率电流引导 dac）的性能。 先前发布的减轻 ISI 的最有效方法是归零 (RZ) 脉冲整形。

1-bit DAC, called an ISI scrambling 1-bit DAC in the remainder of the paper, can be configured in real-time to be taken offline and to swap its transient errors. The idea is to control each of the ISI-scrambling 1-bit DACs such that it spends an equal amount of time with its transient errors swapped and not swapped on average, which causes the