基于电压差缓冲放大器的新型真正混合模式双二次通用滤波器，具有多种输入/输出特性,Applied Sciences

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基于电压差缓冲放大器的新型真正混合模式双二次通用滤波器，具有多种输入/输出特性
Applied Sciences ( IF 2.5 ) Pub Date : 2022-01-26 , DOI: 10.3390/app12031229
Mohammad Faseehuddin , Norbert Herencsar , Sadia Shireen , Worapong Tangsrirat , Sawal Hamid Md Ali

在本文中，提出了一种首创的采用三个 VDBA 和三个无源元件的混合模式通用滤波器。该滤波器在所有四种模式下工作并提供所有五种滤波器响应，即电压模式 (VM)、电流模式 (CM)、跨阻抗模式 (TIM) 或跨导纳模式 (TAM)。此外，相同的滤波器拓扑也可以用作 CM 单输入多输出 (SIMO) 滤波器。基于电压差缓冲放大器 (VDBA) 的 SIMO/MISO（单输入多输出/多输入单输出）型双二阶的各种“电压差”变体的最新比较过滤器进一步突出了所提出研究的重要性。在建议中，生成滤波器响应不需要无源元件匹配。滤波器电路还提供独立于极点频率的品质因数的内置可调性。还进行了滤波器的非理想频率相关增益和分量灵敏度分析。Silterra Malaysia 0.18μm 工艺设计套件 (PDK) 用于使用 Cadence 设计软件设计和验证提议的基于 VDBA 的滤波器。模拟结果与理论预测密切相关。为了进一步验证所提出滤波器的实际可行性，还完成了实验评估。基于 VDBA 的滤波器是使用现成的运算跨导放大器 Intersil CA3080、Texas Instruments LF356 运算放大器和 Analog Devices AD844 实现的。该滤波器设计用于 100 kHz 的特征频率。

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Voltage Differencing Buffered Amplifier-Based Novel Truly Mixed-Mode Biquadratic Universal Filter with Versatile Input/Output Features

In this paper, a first-of-a-kind mixed-mode universal filter employing three VDBAs and three passive components, is proposed. The filter operates in all four modes and provides all five filter responses, namely voltage-mode (VM), current-mode (CM), trans-impedance-mode (TIM), or trans-admittance-mode (TAM). Additionally, the same filter topology can also work as a CM single-input-multi-output (SIMO) filter. A state-of-the-art comparison of various ‘voltage differencing’ variants of the voltage differencing buffered amplifier (VDBA)-based SIMO/MISO (single-input-multi-output/multi-input-single-output)-type biquad filters further highlight the significance of the presented research. In the proposed no passive component matching is required for generating the filter responses. The filter circuit also provides inbuilt tunability of the quality factor independent of the pole frequency. The non-ideal frequency dependent gain and component sensitivity analyses of the filter were also performed. The Silterra Malaysia 0.18μm process design kit (PDK) is employed to design and validated the proposed VDBA-based filter using the Cadence design software. The simulation results closely follow the theoretical predictions. To further verify the practical feasibility of the proposed filter, an experimental evaluation is also completed. The VDBA-based filter is implemented using off-the-shelf operational transconductance amplifiers Intersil CA3080, Texas Instruments LF356 op-amp, and Analog Devices AD844s. The filter is designed for a characteristic frequency of 100 kHz. The time and frequency domain measurement results indicate the proper functioning of the filter.

更新日期：2022-01-26

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