Ex parte BLUM et al. - Page 7

          Appeal No. 1997-0058                                                        
          Application No. 08/300,399                                                  

          White with the active transconductance amplifier slew rate                  
          limiting circuit of Sasaki et al. to obtain a more precise                  
          output waveshape as clearly suggested in column 1 of Sasaki et              
          al."  Claims 8, 11, and 12 all require a gain stage, or                     
          amplifier, and as discussed above, White does not disclose an               
          amplifier.  Sasaki states (column 1, lines 43-45) that "[w]ith              
          slew-rate control, ECL drivers offer good timing margins, good              
          signal integrity, and introduce little noise."  However, as                 
          explained by appellants (Brief, page 17), "there is absolutely              
          no suggestion that the digital driver circuit of Sasaki et al.              
          be interchanged with components of the power supply circuit of              
          White."  In other words, the examiner has failed to provide a               
          proper motivation to combine the references.  Therefore,                    
          Sasaki does not cure the deficiencies of White, and we will                 
          not sustain the rejection of claims 8, 11, and 12.                          


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