Circuit in which the influence must be detected twice before actuation occurs, the magnitude of the influence at the second look bearing a pre-determined ratio to that during the first look
Isekethi apho impembelelo kufuneka yaziwe khona kabini phambi kuqhutyo olululo, ubukhulu bempembelelo kujongo lwesibini ulothwele izinga eliboniweyo kujongo lokuqala