Transient analysis of electrical and linear charge preset on the input stage of surface CCD´s

Transient numerical analysis of electrical signal injection into the surface charge-coupled device (CCD) is given regarding the potential equilibration method. The analysis is composed of the charging and discharging processes of signal charges, characterized by time intervals TCand TDof the respective input pulses. A concept of "setting time TS" explains how the mode of injection converts from the potential equilibration to dynamic injection, and determines an optimum TC. A concept of "residual effect of excess charges" is discussed in relation to sampling effect. The procedure to determine an optimum TDis also proposed. The optimum input timing is divided into two instances in accordance with the degree of the gate length µm. For the instances ( µm) the timing condition is further split into two cases, depending on the biased potential difference . The above conclusions can be applied to setting input pulses and the structure of CCD inputs designed for analog signal processing.