Ex parte SEKIGUCHI - Page 6

            Appeal No. 95-4788                                                                                                     
            Application 07/996,393                                                                                                 

            sweeping and for transferring and that reducing the amplitude of the vertical transfer clock pulses                    
            will sufficiently sweep the residual charges.  The admitted prior art discloses that conventional                      
            imaging devices generate a great amount of power and heat in sweeping and transferring which                           
            have an adverse effect on the characteristics of the sensor (specification, para. bridging pages 5-6).                 
            Therefore, we agree with the examiner's finding that "[i]t is well known in the art of solid state                     
            imaging that for sweep and transfer clock pulses generated during the vertical blanking period, the                    
            power dissipation caused by the high repetition rates that are required can cause the generation                       
            of undesirable heat contributing to an increase in unwanted charges due to thermal noise"                              
            (Examiner's Answer, page 5).  However, the admitted prior art does not suggest reducing the                            
            voltage level used in sweeping to lower the overall power, and therefore the heat and undesired                        
            characteristics, as a solution to the problem.                                                                         
                    The admitted prior art in figure 4 discloses a driver 22 whose amplification factor is                         
            controlled by a reference voltage from power circuit 26 (specification, page 4, lines 10-23).  The                     
            examiner's finding that "[i]t is also standard practice in the design of solid state imagers, as seen                  
            in the admitted prior art device, to provide a means for varying the amplitude of clock pulse                          
            voltages" (Examiner's Answer, page 5) is correct to the extent that the structure in figure 4                          
            determines the amplitude in accordance with a reference voltage.  However, the admitted prior                          
            art does not suggest that the reference voltage is varied or that it takes on other than a single                      
            value.  While the admitted prior art driver may be capable of being modified to provide two                            
            different amplifications the way appellant's apparatus is claimed, there must be a suggestion or                       

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