Digital differential analyzer

Details Digital differential analyzer Digital differential analyzer

1974-08-22

1976-01-20

Morrison, Malcolm A.

Registers

Transfer mechanism

Traveling pawl

23515111, G06J 102

Patent

active

039341305

ABSTRACT:
An improved digital differential analyzer (DDA) circuit wherein the output pulses, representing incremental changes of an integral, are generated at a rate as determined by a remainder size number. An integrand counter responds to pulses representing an incremental change of the integrand to keep track of the correct value of the integrand. Upon the occurrance of a pulse representing an incremental change of the variable of integration the present value of the integrand is added to the number stored in a remainder register thereby generating a new remainder number. The new remainder number is compared to the programmed remainder size number and if the new remainder is equal to or greater than the remainder size number a pulse representing an incremental change of the integral is generated and the new remainder is modified by subtracting the remainder size number from the new remainder number.

REFERENCES:
patent: 3148273 (1964-09-01), Truitt et al.
patent: 3598974 (1971-08-01), Lincoln
patent: 3701890 (1972-10-01), Dummermuth
patent: 3715562 (1973-02-01), Dendy et al.

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