Patent ID: 8581569

Claim:
A current reference generator, comprising: a current network, comprising: first and second transistors of a first conductivity type each having a first current terminal coupled to a first supply line and having a control terminal coupled to a first node, wherein said first transistor has a second current terminal coupled to a second node and wherein said second transistor has a second current terminal coupled to a third node; a third transistor of a second conductivity type having a first current terminal coupled to said second node, having a control terminal coupled to a fourth node, and having a second current terminal coupled to a fifth node; a fourth transistor of said second conductivity type having a first current terminal coupled to said third node, having a control terminal coupled to said fourth node, and having a second current terminal coupled to a second supply line; a fifth transistor of said second conductivity type having a first current terminal coupled to said fifth node, having a second current terminal coupled to said second supply line, and having a control terminal; and wherein said third transistor is diode-coupled in which said second and fourth nodes are coupled together; a bias network coupled to at least one of said first and second supply lines and having a control output coupled to said control terminal of said fifth transistor; and a loop amplifier having an input coupled to said third node and an output coupled to said first node, wherein said loop amplifier is operative to maintain relatively constant current level through said first, third and fifth transistors.