Method and apparatus for digital TACAN output conversion
US4801923A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1984 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Jul 20, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/808
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.