Method and apparatus for digital TACAN output conversion

Details Method and apparatus for digital TACAN output conversion Method and apparatus for digital TACAN output conversion

1984-07-20

1989-01-31

Miller, Charles D.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

H03M 174

Patent

active

048019232

ABSTRACT:
A method and apparatus are disclosed for converting a digital TACAN output into an analog potentiometer input suitable for an analog navigation computer. The apparatus includes an input register for temporarily storing a digital TACAN output signal. A nines complement generation circuit is utilized to generate the nines complement of the digital TACAN output signal and the nines complement is temporarily stored in a second register. The data in each register is then utilized to control one of two identical resistive circuits which are coupled to a common output node so that the total resistance in both circuits is always equal to a selected total resistance. In a preferred embodiment of the present invention, a plurality of optically coupled solid state relays are utilized to control the resistive circuits.

REFERENCES:
patent: 2877398 (1959-03-01), Gimpel
patent: 3098969 (1963-07-01), Liss
patent: 3273143 (1966-09-01), Wasserman
patent: 3366947 (1968-01-01), Kawashima
patent: 3579227 (1971-05-01), Appelgren

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