closed circuit

• Système dans lequel le signal de sortie est renvoyé à l'entrée, formant une boucle fermée ; souvent utilisé en électrotechnique, dans les systèmes de télévision ou les caméras de vidéosurveillance, où le signal n'est transmis qu'à certains récepteurs.

A system where the output is fed back into the input, creating a loop; commonly used in electrical engineering, television systems, or security cameras where the signal is transmitted only to specific receivers.

1. B2formal

   A complete electrical circuit through which current can flow.

   circuit fermé

   • The device only works when the closed circuit is properly connected.
   • A closed circuit allows electricity to flow continuously.
   • The technician checked the closed circuit for any breaks.

2. Video surveillance systemB1formal

   A television system in which signals are not publicly broadcast but are transmitted to a limited set of monitors, often used for security.

   circuit fermé de télévision

   • The building is monitored by a closed circuit television system.
   • Closed circuit cameras are installed in the parking lot for safety.
   • Security guards watch the closed circuit feeds in real time.