DEVICE FOR TRANSMISSION AND RECEPTION OF ADDITIONAL INFORMATION THROUGH BROADCAST CHANNEL WITH FREQUENCY MODULATION

摘要

FIELD: devices for transmission and reception of additional information. SUBSTANCE: controlled amplifier 3 is introduced to circuit for transmission of additional information signal. Gain of controlled amplifier is controlled total part A + B of spectrum of complex stereo signal. When combined signal is received, similar processing of complex stereo signal restores constant level of additional information signal. Device may be used in personal radio call systems because it provides non-distorted transmission of both broadcast signal and additional information. EFFECT: increased functional capabilities. 4 dwg