Current comparator

摘要

The absorption of current from the supply rails by a current comparator circuit producing a logic configuration of two complementary nodes of a first branch and of a second branch, respectively, in function of the comparison between a first current forced through the first branch and a second current forced through the second branch is limited by discriminating the lowest between the two compared currents and by mirroring the discriminated lowest current on the circuit branch through which the highest current is being forced. The comparator circuit comprises means that are responsive to the logic configuration of the two complementary nodes of the comparator circuit so as to assume a state capable of configuring the circuit to function as a current mirror that forces the lowest current on the other branch of the current comparator circuit. <IMAGE> <IMAGE>