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首页> 外文期刊>Serbian Journal of Electrical Engineering >Reduction the effects of opamp finite gain and offset voltage in LDI termination with a minus one half delay of SC ladder filters
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Reduction the effects of opamp finite gain and offset voltage in LDI termination with a minus one half delay of SC ladder filters

机译：通过SC梯形滤波器的负一半延迟减少LDI端接中运算放大器有限增益和失调电压的影响

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摘要

In this paper a combined approach for reducing the effects of op amp imperfections (finite gain A and offset voltage VOS) in first-order SC cell, realizing LDI (loss less discrete integrator) termination with a minus one half delay is presented. First, the conventional integrator is replaced with gain- and offset-compensated (GOC) integrator. Next, the gain errors m(ω) and the phase errors θ(ω) are further reduced by using the precise op amp gain approach in the GOC structure. The variation of the dc gain A from its nominal value A0 is taken into account.
机译：本文提出了一种组合方法，用于减少一阶SC单元中的运算放大器缺陷（有限增益A和失调电压VOS）的影响，实现具有负一半延迟的LDI（损耗较小的离散积分器）端接。首先，将常规积分器替换为增益和偏移补偿（GOC）积分器。接下来，通过在GOC结构中使用精确运算放大器增益方法，进一步减小了增益误差m（ω）和相位误差θ（ω）。考虑了直流增益A与其标称值A0的差异。

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