Design and Realization of Phase Sensitive Detector Circuitry of Two-Channel Ring-Core Flux-Gate Compass

Yim, Jeong-Bin

Journal of Navigation and Port Research 2002;26(1):127-136.
Published online March 31, 2002.

Design and Realization of Phase Sensitive Detector Circuitry of Two-Channel Ring-Core Flux-Gate Compass

Abstract

This paper presents a discussion on the design and realization for the Phase Sensitive Detector (PSD) circuitry of Flux-gate Compass that gives direction information to the Directional Frequency Analysis and Recording (DIFAR) Sonobuoy in Air Anti-Submarine Warfare. PSD circuitry is realized with Twin-T RC networked active band-pass filter. Results of a performance test for the PSD circuitry shows that the effectiveness of band-pass filtering of desired 2F₀ second harmonic signal, which is pro-portional to the direction of earth’s magnetic field This resulted in the extraction of direction information.

Key Words: Electronic Magnetic-compass;Sonobuoy;2-axis Ring-core Flux-gate;Earth’s Magnetic;Phgase Sensitive Detector(PSD)