CONTROL CIRCUIT Russian patent published in 2007 - IPC H03K19/00 

FIELD: railroad automatics.

SUBSTANCE: control circuit contains comparator for controlling amplifiers powering voltage level, sent to one input of which is control frequency signal, and to second input - signal from power source, output of comparator is connected to input of dynamic signal amplifier, from output of which signal is transferred to input amplifier, from direct and inverse outputs of which signals are transferred through circuits of galvanic decoupling onto amplifiers of channels, generating counter-phase signals of control frequency, which are sent to circuit for generation of signal of reverse communication of negative polarity, at output of which power voltage for input amplifier is formed, from control points counter-phase controlled dynamic signals are sent to amplifiers of signal of first and second control points respectively, which send signals to input shoulders of two diode rectifier bridges, connected in parallel, from output of rectifier bridges first and second channel amplifiers are powered, respectively, output dynamic control frequency signal is measured on inverse input of input amplifier through additional galvanic decoupling circuit.

EFFECT: increased sensitivity, safety and reliability of device operation.

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