FIELD: medical engineering.
SUBSTANCE: device has electrodes, preamplifier, microprocessor, lower and upper level memory units, the first comparison unit, controllable threshold unit, alarm signal unit, magnetic recorder, unit for producing acoustic signals, high frequency oscillator, amplitude modulator, modulating code generator, phase manipulator, power amplifier, transmitting antenna, receiving antenna, retuning unit, the first and the second heterodynes, the first and the second mixers, the first and the second amplifiers of intermediate frequency, detector, the first and the second delay line, the first and the second key, amplitude restrictor, synchronous detector, phase detector, phase doubler, the first and the second unit for measuring spectrum width and the first and the second threshold units.
EFFECT: improved noise immunity and selectivity of device receiver.
4 dwg
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Authors
Dates
2004-12-27—Published
2003-05-16—Filed