Digital converter of frequency deviation based on three frequency generator

摘要

In the work the synthesis of digital converters of frequency deviation is considered. The synthesis is based on self-oscillation system with combinative interaction of the three frequencies in the mode of increased sensitivity. This mode is achieved by the inclusion of two cascaded amplifiers with a typical and an inverted phase-frequency characteristics. This allows obtaining a small angle of the equivalent phase-frequency characteristics of open self-oscillating system with still narrow-band amplitude-frequency response. To realize the possibility of realization of such structure the use of digital filters with independent phase-frequency characteristics offset is proposed. The filters are implemented by the frequency sampling method. The main area of developed converter application is to increase Doppler frequency deviation.