FIELD: radio engineering.
SUBSTANCE: radio device that has antenna, detector, audio-frequency amplifier, resonance-tuned LC circuit, switch, N logic inverters, N voltage dividers, N light-emitting diodes, current-limiting resistor, power supply, and isolating resistor is provided in addition with blocking capacitor that functions to isolate resonance-tuned LC circuit from supply voltage.
EFFECT: ability of using all types of resonance-tuned LC circuits.
2 cl, 2 dwg
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