电流模式可重构模拟信号处理电路

Current-Mode Reconfigurable Analog Circuit for Analog Signal Processing

针对现有的可重构模拟电路存在功能有限、带宽小、灵活性不足等问题,设计了一种新的电流模式可重构模拟电路。设计了基于二代电流传输控制器的可重构模拟单元,能减小电路非线性失真,提高电路工作速度与抗干扰能力。设计了一种可编程开关数量较少的纵横交叉开关网络结构,提高了电路灵活性和高频性能。在2×4阵列结构上分别重构实现了四阶低通滤波器和模拟乘法器,实验结果表明所设计可重构模拟电路是有效的。

There are problems of limited function,low operational speed and insufficient flexibility in the conventional reconfigurable analog circuits.A new currentmode reconfigurable analog circuit is proposed to solve them.The configurable analog block（CAB） based on second-generation current controlled conveyor（CCCII） is designed,which has the advantages of smaller nonlinear distortion,higher operational speed and better anti-interference ability.A new crossbar switch inter-connection network is developed,which can reduce the number of switches,and improve the flexibility and high frequency response of the reconfigurable analog circuit.The forth-order butterworth low-pass filter（LPF） and the analog multiplier are reconfigured with 2×4 reconfigurable analog circuit array. The experimental results show that the proposed reconfigurable analog circuit can effectively realize analog signal processing circuits of different functions through reconfiguration.