Direction finding system

A direction finding system of the type displaying a present direction on a dial defining 4N direction indicating radialized regions by 2N radialized boundaries, where N is a positive integer, said system comprising a direction finding sensor for generating two periodical electric signals corresponding to two perpendicular components of the direction of the earth's magnetic field;

• tuning and amplifying circuits for tuning and amplifying the electric signals to produce a pair of direction signals in a relation that their maximum values become equal with each other;
• a discrimination circuit for producing first 2N binary signals indicating in sign whether the magnitude of the direction signals are larger or smaller than predetermined 2N boundary indicating levels which angularly define the 4N radialized regions;
• latch circuits for generating and latching second direction indicating 2N binary signals respectively;
• a decoding circuit for sorting the second 2N binary signals to generate one of 4N number of direction signals;
• and
• a display section for displaying any one of 4N directions in response to the generated signal of said sorting circuit.