Serial arithmetic functions with magnetic bubble logic elements

A magnetic bubble device for performing an arithmetic operation on magnetic bubble streams representative of binary numbers, comprising:

• input means for two or more magnetic bubble streams representative of binary integers;
• output means for at least one bubble stream representative of the result of the arithmetic operation;
• an airthmetic unit connected between said input and output means, said arithmetic unit comprising a plurality of magnetic bubble elements, said elements including:
• a first two-input AND-EXCLUSIVE OR bubble logic gate having first and second inputs, and outputs representative of the logical AND and the EXCLUSIVE OR operation on said two inputs;
• an incremental adder bubble logic element having a first word input connected to said EXCLUSIVE OR output of said first gate, and a second one bit increment input connected through a 1-bit delay element to said AND output of said gate, thereby providing a serial adder;
• and
• second and third AND-EXCLUSIVE OR bubble logic gates interconnected on the inputs to said serial adder, for providing a carry-save adder for adding three binary numbers.

A magnetic bubble device for performing an arithmetic operation on magnetic bubble streams representative of binary numbers, comprising:

• input means for two or more magnetic bubble streams representative of binary integers;
• output means for at least one bubble stream representative of the result of the arithmetic operation;
• an arithmetic unit connected between said input and output means, said arithmetic unit comprising a plurality of magnetic bubble elements, said elements including:
• a first two-input AND-EXCLUSIVE OR bubble logic gate having first and second inputs, and first and second outputs representative of the logical AND operation and a third output representative of the EXCLUSIVE-OR operation;
• a bubble replicator element having an input and first and second outputs, said replicator input being connected to said EXCLUSIVE OR output of said gate;
• means for merging said first replicator output with said first AND output of said gate;
• and
• means for supplying said merged outputs to said first input of said gate, thereby providing a continuous stream of bubbles through said gate, such that a binary number input to said second input of said gate is output from said second replicator output inverted with respect to said input binary number, thereby providing an inverter.

A magnetic bubble device for performing multiplication and division arithmetic operations on magnetic bubble streams representative of binary numbers, comprising;

• input means for two or more magnetic bubble streams;
• output means for at least one bubble stream representative of a partial arithmetic operation performed on said input bubble streams;
• a magnetic bubble cellular unit connected between said input and output means, said magnetic bubble unit comprising;
• a plurality of magnetic bubble elements, said plurality including a first group of elements configured in a fixed logical relationship to one another for performing a predetermined logical operation on said input bubble streams, and a second group of elements configured in a fixed logical relationship to one another for performing a second predetermined operation on said bubble streams, said first and second groups of elements being interconnected such that said magnetic bubble cellular unit performs said partial arithmetic operation, and wherein said bubble unit is further characterized in being adapted to be interconnected in tandem with other like bubble units in a pipeline configuration to perform said arithmetic operation.