FIELD: electric engineering, possible use in 220V lines for creating a communication channel being part of a system of protective television signaling of objects such as cottages, garages, trade posts and similar locations having no phone or radio connection to police.
SUBSTANCE: passive-active type generator for injecting current signals into 220V line at 50Hz frequency has additionally introduced two capacitors, electrolyte capacitor, two resistors, connected to generator element in accordance to invention formula.
EFFECT: generation of signal current at generator key commutation frequency and injection of signal into 220V line in accordance with Phase-Ground scheme.
1 dwg
