The Use of a Fractional Bi-Stable Multivibrator Counter in the Design of an Automatic Discriminator Calibrator

This paper discusses the approach used in the design of an automatic discriminator calibrator system. This design led to analysis of the use of bi-stable multibrators to obtain a fractional countdown of the output frequency of a crystal oscillator. The final counter waveform is filtered to extract only a sinusoidal component of the square wave from the counters. Some properties of fractional counters are discussed, including the use of a 382.5:1 counter in the calibrator system.