用开关电流技术实现连续小波变换的改进方法

提出了一种用开关电流技术实现连续小波变换的改进方法，即采用梯形公式逼近数值积分的原理改进用于逼近连续小波变换的带通滤波器组，并用开关电流电路实现，还详细分析了这种改进对于减小逼近误差的优势所在．以开关电流的双二次滤波器实现八通道的Marr小波为例，简述了设计过程和仿真结果，从而证实了这种改进的可行性．

An improvement on Implementation of Continuous Wavelet Transform Using Swithed-Current Circuit

An improved method of implementing continuous wavelet transform using switched-current (SI) circuit is proposed. Trapezoid formula is used to approach numerical integration, and according to this principle, a bank of bandpass filters are improved to approximate the continuous wavelet transform, and implement these filters with SI circuit. The improvement in error reduction is analyzed in detail and we can see clearly the advantages. As an example, the eight channels of Marr wavelet are realized by the biquadratic filters of SI circuit, and the design course and the simulation result are provided, which indicate the feasibility of the improvement.