This study presents a new architecture for a field programmable analog array (FPAA) for use in low‐frequency applications, and a generalized circuit realization method for the implementation of nth‐order elliptic filters. The proposed designs of both the FPAA and elliptic filters are based on the operational transconductance amplifier (OTA) used in implementing OTA‐C filters for biopotential signal processing. The proposed FPAA architecture has a flexible, expandable structure with direct connections between configurable analog blocks (CABs) that eliminates the use of switches. The generalized elliptic filter circuit realization provides a simplified, direct synthetic method for an OTA‐C symmetric balanced structure for even/odd‐nth‐order low‐pass filters (LPFs) and notch filters with minimum number of components, using grounded capacitors. The filters are mapped on the FPAA, and both architectures are validated with simulations in LTspice using 90‐nm complementary metal‐oxide semiconductor (CMOS) technology. Both proposed FPAA and filters generalized synthetic method achieve simple, flexible, low‐power designs for implementation of biopotential signal processing systems.

中文翻译：

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用于实现通用n阶运算跨导放大器C椭圆滤波器的现场可编程模拟阵列

这项研究提出了一种用于低频应用的现场可编程模拟阵列（FPAA）的新架构，以及一种用于实现n阶椭圆滤波器的通用电路实现方法。FPAA和椭圆滤波器的建议设计均基于用于实现生物电势信号处理的OTA-C滤波器的运算跨导放大器（OTA）。所提出的FPAA体系结构具有灵活，可扩展的结构，可配置模拟模块（CAB）之间直接连接，从而无需使用开关。通用椭圆滤波器电路的实现为使用接地电容器的OTA-C对称平衡结构提供了一种简化的，直接合成的方法，该结构用于具有最少组件数的偶数/奇数次低通滤波器（LPF）和陷波滤波器。滤波器被映射在FPAA上，并且两种架构都通过使用90nm互补金属氧化物半导体（CMOS）技术的LTspice中的仿真进行了验证。提出的FPAA和滤波器通用综合方法均实现了用于实施生物电势信号处理系统的简单，灵活，低功耗的设计。