Method and apparatus for digital TACAN output conversion
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United States of America Patent
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Jan 31, 1989
Grant Date -
N/A
app pub date -
Jul 20, 1984
filing date -
Jul 20, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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