A new accelerated transfer method for the CPD image sensor

A new charge transfer method for the CPD image sensor is proposed. In this method a high transfer speed is achieved with the use of an accelerated charge priming transfer (CPT) coupler, which consists of the array of the conventional CPT's and inverter amplifiers. This constitution strikingly increases the speed as well as the efficiency of the charge transfer from the vertical transport lines with large capacitance to the horizontal buried-channel charge-coupled (BCCD) shift register. Under a high transfer efficiency of more than 98 percent, a short transfer time less than 1 µs has been attained, independently of the signal charge magnitude.