This work focuses on proposing FPAA architecture based on operational transconductance amplifier (OTA) as the basic block for low frequency continuous time signal processing. Two FPAA architectures are presented after a step by step development of the design structure. The architectures eliminate the use of switches for signal routing, instead they allow reconfigurability using a selecting network composed of OTAs. The proposed architectures demonstrate flexibility in architecture allowing the expansion of the basic structure. Both architectures allow the implementation of individual independent circuits with an option of cascading if required. Multiple filter circuits can be mapped on the FPAA with independent control and reconfigurability of gain, bandwidth, and notch frequency, thus allowing the use of the FPAA as a filter bank. As for the provided cascading feature, it allows the implementation of a system or a set of cascaded filters as desired by designer. Validation of proposed FPAA architecture and its characteristics is examined through simulation on LTspice using 90 nm CMOS technology with supply voltage of ±0.6 V. A single 4th-order lowpass filter is implemented first and then a combination of amplifier, notch filter and lowpass filter is implemented. Simulation results of the filters on proposed FPAA is compared to results acquired from simulation of the circuits alone (off-FPAA) showing excellent agreement between both results, hence confirming the proposed FPAA architecture.

这项工作着重于提出基于运算跨导放大器（OTA）的FPAA体系结构，将其作为低频连续时间信号处理的基本模块。在逐步设计结构开发之后，提出了两种FPAA架构。该架构消除了使用交换机进行信号路由的麻烦，而是允许使用由OTA组成的选择网络进行可重配置。所提出的体系结构展示了体系结构的灵活性，从而允许扩展基本结构。两种架构都允许实现独立的电路，并在需要时进行级联。多个滤波器电路可以映射到FPAA上，具有独立的增益，带宽和陷波频率控制和可重新配置性，因此可以将FPAA用作滤波器组。至于所提供的级联功能，它允许设计人员实现所需的系统或一组级联滤波器。通过使用90 nm CMOS技术，电源电压为±0.6的LTspice进行仿真，可以检验所提出的FPAA体系结构及其特性的有效性。 V。首先实现单个四阶低通滤波器，然后实现放大器，陷波滤波器和低通滤波器的组合。将拟议FPAA上滤波器的仿真结果与仅通过电路仿真（off-FPAA）获得的结果进行比较，表明两个结果之间具有极好的一致性，从而确认了拟议的FPAA体系结构。