Current source able to operate at low supply voltage and with quasi-null current variation in relation to the supply voltage

摘要

A current source includes a current mirror and a core connected together between two supply terminals. The current mirror comprises a pilot transistor and first and second recopy transistors. The core comprises first and second transistors and a resistance. The first transistor and the first recopy transistor are connected together to form a first branch. The resistance and the second recopy transistor are connected together to form a second branch. The pilot transistor and the second transistor are connected together to form a third branch. These branches are connected between the two supply terminals. The first transistor is linked to the second branch between the resistance and the second recopy transistor. The second transistor is connected to the first branch between the first core transistor and the first recopy transistor.