Logarithmic function generating system

Details Logarithmic function generating system Logarithmic function generating system

1976-04-29

1977-09-06

Ruggiero, Joseph F.

Registers

Transfer mechanism

Traveling pawl

235197, 328145, G06J 100, G06G 724

Patent

active

040469999

ABSTRACT:
A logarithmic function generating system which generates an output signal bearing a logarithmic functional relation to the input signal. The time constant RC of a resistance-capacitance circuit is increased for every unit time elapsed in proportion to the unit time to produce a broken line approximating the logarithmic function. With its simple circuit construction employing no elements whose characteristics vary with ambient temperature changes or which tend to involve variations in characteristics among the elements of the same type, the system is capable of generating the desired logarithmic function output with a high degree of accuracy.

REFERENCES:
patent: 3579127 (1971-05-01), Thomas
patent: 3649826 (1972-03-01), Larsson et al.
patent: 3805046 (1974-04-01), Magnussen, Jr.
patent: 3828255 (1974-08-01), Schuon
patent: 3878383 (1975-04-01), Uchida

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