#feedback_circuit__feedback_loop  a circuit that feeds back some of the output to the input of a system
  supertype:  #electrical_circuit__circuit__electric_circuit  an electrical device that provides a path for electrical current to flow
  subtype:  #control_circuit__controlcircuit__negative_feedback_circuit  a feedback circuit that subtracts from the input

No statement uses or specializes #feedback_circuit; click here to add one.