论文部分内容阅读
提出基于开关电流技术的小波变换的滤波器电路实现方法.小波变换的开关电流滤波器实现电路由冲激响应为高斯一阶导数及其膨胀函数的滤波器组构成.开关电流滤波器的膨胀系数(尺度)通过控制宽长比(W/L)或时钟频率可得到精确地控制.Pad啨逼近是一种有效的有理逼近,小波函数经过Pad啨变换可以得到其有理分式逼近,十分利于其开关电流滤波器电路实现.仿真结果证实了其可行性.
A method based on switched-current technology is proposed to realize the filter circuit based on wavelet transform.The switching current filter in wavelet transform circuit is composed of a filter bank whose impulse response is Gaussian first-order derivative and its expansion function.The expansion coefficient of switch current filter (Scale) can be precisely controlled by controlling the aspect ratio (W / L) or the clock frequency.The Pad 啨 approximation is an effective rational approximation, and the wavelet function can get its rational fractional approximation through Pad 啨 transformation, which is very beneficial to it Switch current filter circuit implementation.The simulation results confirm its feasibility.