Title : 
A Dual Amplifier Differentiator
         
        
        
            Author_Institution : 
Department of Electrical Engineering, Columbia University, New York, N. Y.
         
        
        
        
        
        
            Abstract : 
A method of converting certain types of analog signals to digital form is described. The signals considered are those describing movement in a plane and are digitized by reference to a rectangular array of l´s and O´s.
         
        
            Keywords : 
Arithmetic; Circuits; Control systems; Diodes; Feedback; Frequency; Inverters; Operational amplifiers; Registers; Transfer functions;
         
        
        
            Journal_Title : 
Electronic Computers, IEEE Transactions on
         
        
        
        
        
            DOI : 
10.1109/PGEC.1966.264413