Digital calculating apparatus

Details Digital calculating apparatus Digital calculating apparatus

1974-07-19

1976-04-27

Atkinson, Charles E.

Registers

Transfer mechanism

Traveling pawl

235165, 340347AD, G06F 748, G06F 752

Patent

active

039537188

ABSTRACT:
Digital calculating apparatus, which is particularly suitable for linearizing a digitized output signal produced by a non-linear transducer such as a thermocouple, comprises a store connected in a recirculating loop including combined adder and subtractor circuit, means for changing a number entered in the store to a predetermined target value by a linear or an exponential progression involving groups of N adding or subtracting-cycles, means for counting and storing the numbers of groups of cycles required to achieve the target value, and means for entering another number in the store and subjecting it to the same numbers of groups of M adding or substracting cycles, where M .ltoreq. N, to produce the required answer. For linearizing the digitized output signal x from a thermocouple, where x is given by T = a.sub.o + a.sub.1 x + a.sub.2 x.sup.2 + . . . ta.sub.n x.sup.n, the apparatus is used, with M=N=1, to generate the reciprocal Y of X, and then used to perform successive add and divide recursions to evaluate the equation ##EQU1##

REFERENCES:
patent: 3686665 (1972-08-01), Elias et al.
patent: 3699318 (1972-10-01), Underkoffler et al.
patent: 3701145 (1972-10-01), Bergin

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