THE MINI-O, A DIGITAL SUPERHET, OR A TRULY LOW-COST OMEGA NAVIGATION RECEIVER

摘要

A quartz tuning fork filter circuit and some unique CMOS clock logic methods provide a very simple OMEGA-VLF receiver with true hyperbolic station pair phase difference outputs. An experimental system has been implemented on a single battery-operated circuit board requiring only an external antenna preamplifier, and LOP output recorder. A bench evaluation and preliminary navigation tests indicate the technique is viable and can provide very low-cost OMEGA measurement systems. The method is promis?ing for marine use with small boats in the present form, but might be im?plemented in conjunction with digital microprocessors for airborne navigation aids.