[Help]   [Welcome]   [Boolean]   [Advanced]   [Sales] 
                             [USPTO] [CNIDR]
---------------------------------------------------------------------------

---------------------------------------------------------------------------
 United States Patent                                             4,011,461
 Chang, et. al.                                                Mar. 8, 1977
---------------------------------------------------------------------------
Pipelined universal bubble logic array 

 Inventors: Chang; Hsu (Yorktown Heights, NY); Chen; Tien C. (San Jose, CA); Lee;
            Share-Young (Lake Mohegan, NY). 
 Assignee:  International Business Machines Corporation (Yorktown Heights, NY). 
 Appl. No.: 596,932
 Filed:     Jul. 17, 1975
---------------------------------------------------------------------------
                        Related U.S. Application Data 

  Continuation of (including streamline cont.)
		 Ser. No.488,876, Jul. 15, 1974, abandoned.

 Intl. Cl.:                                          G11C 11/14; H03K 19/168
 U.S. Cl.:                                            307/ 88.LC; 340/174.TF
 Field of Search:                              340/174 TF, 174 VB; 307/88 LC
---------------------------------------------------------------------------
                      References Cited [Referenced By:] 
---------------------------------------------------------------------------
                            U.S. Patent Documents 

     3,765,004       Oct., 1973        Caron          340/174TF
     3,798,607       Mar., 1974     Minnick et al.    340/174TF
     3,866,191       Feb., 1975     Minnick et al.    340/174TF

Primary Examiner: Moffitt; James W. 
Attorney, Agent or Firm: Pollock, Vande Sande & Priddy 
---------------------------------------------------------------------------
                                  Abstract
---------------------------------------------------------------------------
   A bubble logic array with n data inputs for performing any Boolean (or
   switching) logic function. Each of the data inputs comprises binary
   information in the form of the presence or absence of discrete bubbles.
   The logic function is performed by the propagation, channeling, and
   interaction of the bubbles themselves. The particular logic function
   performed by the array may be fixed by permanent connections of
   selective control inputs to bubble generators. Alternatively, a
   universal logic array may be provided by using a further 2(^n) bubble
   inputs as controls to separately personalize the array. In this manner,
   the logic function performed by the array may be varied with each set of
   controls to achieve dynamically alterable logic. When the data inputs
   each comprise an input bubble pattern the logic array in either the
   fixed form or the alterable form is capable of pipelining operations,
   producing one meaningful output at every bit cycle. 

                         24 Claims, 6 Drawing Figures 
---------------------------------------------------------------------------
                             [USPTO] [CNIDR] 
---------------------------------------------------------------------------