SUPER HETERODYNE RECEIVER AND FREQUENCY METER Russian patent published in 2006 - IPC G01R23/00 

FIELD: radio engineering, possible use as panoramic super heterodyne receiver with frequency analysis, working under conditions of receipt in wide dynamic and frequency ranges.

SUBSTANCE: super heterodyne receiver and frequency meter contains amplifier of input signals, to output of which two receiving channels are connected, each one of which consists of serially connected mixer, narrowband filter of intermediate frequency, intermediate frequency amplifier, amplitude detector and amplitude comparator, two heterodynes based on digital frequency synthesizer, circuit for controlling frequency of heterodynes, source of supporting voltage and solving device. Usage of heterodynes with fixed frequency shift during their adjustment, selection of ratio of filter bands of intermediate frequency makes it possible to abolish use of specialized channel for protection from receipt at mirror frequency and to realize receipt and measurement of signal parameters simultaneously in main and mirror frequency bands.

EFFECT: increased band of simultaneous receipt and measurement of signal parameters with given band of intermediate frequency route.

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