中文摘要：

提出一种基于傅里叶级数的多环反馈结构开关电流小波滤波器设计新方法。利用傅里叶级数法求取小波函数的时域小波逼近函数,以双输入多输出开关电流双线性积分器和单输入多输出电流镜作为基本单元设计相应的多环反馈结构小波滤波器,并通过调节开关电流滤波器的时钟频率获得不同尺度小波函数。对所设计的电路进行时域、频域和灵敏度分析,并研究元件非理想性对电路的影响。研究结果表明：该方法的小波逼近函数求取容易,滤波器电路具有设计简单、灵敏度低和受非理想性因素影响小的特点。

英文摘要：

A novel design method of switched-current（SI） wavelet filter with multiple-loop feedback（MLF） structure was presented based on Fourier series. The time domain wavelet function was approximated using Fourier series method.The wavelet filter whose impulse response was the approximated wavelet function was designed using MLF with bi-input-multi-output SI bilinear integrators and single-input-multi-output current mirrors as the basic building blocks. By changing the clock frequency, different scale wavelet functions were obtained. The time and frequency domain responses,sensitivity and influence of component imperfection of the wavelet filter circuit were analyzed. The results indicate that the proposed method has the features of easy wavelet approximation, simple filter circuit design, and low sensitivity and low imperfection influence.