Self-adjusting narrowband receiver

摘要

Unlike the self-adjusting narrowband receiver described in the main application, the resonant frequency and quality can be controlled and adjusted with simpler algorithms and thus with less memory space by means of special feedback, designed as a controlled current source, in the audion circuit and by means of frequency conversion of the signal after the audion circuit and by subsequent amplification. Complete interference-suppression of the receiver can furthermore be achieved by operating the audion circuit during adjustment below the freely oscillating state and, following a search through a predefined frequency window, the transmitter having the matching modulation is adjusted.