Improvements in protective circuits of the secret of communication in mensafonic systems. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in protective circuits of the communication secret in messaging systems, of the type comprising an if detector module that feeds the audio module controlled by a decoder module, characterized in that in the silencing voltage line, which connects the fm demodulator with the logic gates that control the power switch of the audio module, a capacitor of appropriate capacity, put by its other armature to ground of the message circuit, is shunted. (Machine-translation by Google Translate, not legally binding)