An optimal design of split-electrode CCD transversal filters

A new optimal design method is introduced for split-electrode CCD transversal filters. This method uses mixed-integer programming techniques to quantize filter parameter values consistent with actual mask dimensions. It improves filter performance over other design methods that use roundoff approximation to quantize mask parameter values. As Illustrated through examples of low-pass and notch-filter designs, our optimal design method can improve the performance significantly; in the design of a low-pass filter, it increased the stopband attenuation from 34 to 50 dB, and in the design of a notch filter, a 75-dB notch was achieved which had been completely obliterated when parameters were quantized by using roundoff approximation.