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.