Divers Navigation Display.
DEPARTMENT OF THE NAVY WASHINGTON D C
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A digital circuit for computing unknown angle theta comprises first and second programmable read-only-memories PROMS each outputting an eight-bit representation of the logarithm of respective digital inputs representing K sin theta and K cos theta respectively. Second PROMS each output the twos compliment of the logarithm respective digital inputs, a pair of adders connected to the PROMS produce an output corresponding to the logarithm of tangent theta, another pair of PROMS are connected to the adders and are programmed as look-up tables to produce outputs corresponding to theta. A latch circuit and digital-to-analog convertor complete the novel circuit.
- Computer Hardware