Harmonic generator based on the controled band pass filter of the second order

The paper presents the block diagram of the controlled harmonic generator with a quick-response system of stabilization of the amplitude of output oscillations. The design ratio for finding transfer and frequency characteristics of the generator is specified. Amplitude-frequency characteristics of the controlled filter, which is a part of the generator, are presented in the relative units. Graphic dependences of the transfer coefficients on the relative frequency detuning allow to calculate the gain-bandwidth, attenuation coefficient and controlled filter band pass that defines the basic parameters of the generator. Fast-response voltage sensor and analog voltage dividers, which do not contain reactive elements, provide the generator’s good performance under the dynamic conditions when switching from one frequency to another. To reduce the startup time of the generator, single-pulse shaper produces a correction signal, which greatly improves the dynamics of the transfer process. The design ratios are checked on the mathematical model using PSIM-9. The results of the analytical calculations and mathematical modeling correlate well. The generator can be configured in an integrated or hybrid type using modern operational amplifiers and analog precision multipliers, which do not require adjustment elements. The developed generator has small nonlinear distortions of the generated signals and can be used in electronics, automatics, telecommunications, measurement technology, automated control systems.