METHOD FOR GENERATION AND FREQUENCY MODULATION OF HIGH-FREQUENCY SIGNALS AND APPARATUS THEREFOR Russian patent published in 2015 - IPC H03C1/00 

FIELD: radio engineering, communication.

SUBSTANCE: disclosed is a method for generation and frequency modulation of high-frequency signals. The method is based on converting the energy of a dc voltage source into the energy of a high-frequency signal; interaction of the high-frequency signal with a direct transmission circuit, made of cascade-connected three-terminal nonlinear element and four-terminal element, a load and a external feedback circuit; satisfying excitation conditions in the form of an amplitude balance and a phase balance, which determine the amplitude and frequency of generated high-frequency signals, conditions of matching the direct transmission circuit with the load and conditions of matching the load with the control electrode of the three-terminal nonlinear element; varying the frequency of the generated signal according to the law of variation of the amplitude of a low-frequency control signal. The load is in the form of a first two-terminal element with complex impedance; an arbitrary composite four-terminal element connected to the direct transmission circuit on a parallel-series circuit is used as the external feedback circuit. The direct transmission circuit and the feedback circuit as a single unit are cascade-connected between a second two-terminal element with complex impedance which imitates the resistance of the signal source of a generator and a frequency modulator in gain mode, and the load.

EFFECT: wider range of generated oscillations in a given variation range of the amplitude of the control signal.

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