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Second-order OTA-C filters derived from Nawrocki-Klein biquad

机译:源自Nawrocki-Klein biquad的二阶OTA-C滤波器

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摘要

Based on the Nawrocki and Klein biquad and using different input and output techniques, many new filter structures and functions are developed from both voltage- and current-mode viewpoints. For example, it is found that the basic five operational transconductance amplifier (OTA) structure has the LP, BP, HP, BS and AP functions without the use of capacitor injection and component matching, a feature shared by no other existing two integrator loop OTA-capacitor (OTA-C) circuit, including the original NK biquad. Various BS, LPN, HPN, AP and universal architectures are obtained, which require fewer OTAs and may be more useful than the original biquad. This research shows that the NK biquad is one of the most important second-order OTA-C filters at least from the viewpoint of filter architectures and functions, and thus should receive attention in continuous-time filter design.
机译:基于Nawrocki和Klein双二阶,并使用不同的输入和输出技术,从电压模式和电流模式的角度开发了许多新的滤波器结构和功能。例如,发现基本的五个运算跨导放大器(OTA)结构具有LP,BP,HP,BS和AP功能,而无需使用电容器注入和组件匹配,这一特性是其他任何现有的两个积分器环路OTA所没有的。 -电容器(OTA-C)电路,包括原始的NK双二阶。获得了各种BS,LPN,HPN,AP和通用体系结构,它们需要较少的OTA,并且可能比原始的biquad更有用。这项研究表明,至少从滤波器的结构和功能的角度来看,NK双二阶是最重要的二阶OTA-C滤波器之一,因此在连续时间滤波器设计中应引起注意。

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