Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Generator of Modulated Pulses for Powering a Fluxgate in Devices for Measuring Magnetic Field Strength With a Frequency as a Useful Signal A.P. NIKISHECHKIN, L.M. DUBROVIN, V.I. DAVIDENKO The article examines a frequency-measuring approach to the construction of measuring devices based on fluxgate converters. It was found that the frequency of the generator, made on logic elements and used to power the excitation winding of the flux gate, depends on the magnitude of the measured magnetic field. The use of frequency as a useful signal carrying information on the magnitude of the magnetic field strength is fraught with difficulties due to the fact that the frequency deviation from the rated value leads to a loss of the flux gate operation effi ciency. And the larger the range of measured values of tension, the greater this deviation. In order to overcome these difficulties, an original circuit of a modulated voltage pulse generator is proposed for feeding the excitation winding of a fl ux gate. The frequency of the modulating voltage pulses is constant and corresponds to the operating (passport) frequency of the flux gate. The filling frequency of the modulating pulses (that is, the frequency of the modulated pulses), which depends on the magnitude of the measured intensity, can vary over a wide range. A significant deviation of the filling frequency is provided by the non-standard use of the fluxgate output winding, which is connected to the feedback circuit of the filling (modulated) pulse generator. Keywords: Measurement of magnetic field strength, fluxgate, powering the excitation winding of the fluxgate, modulated pulse generator, frequency as a useful signal. DOI: 10.25791/pribor.09.2020.1203 Pp. 06-10.