Patent ID: 6930542

Claim:
A current source circuit with differential gain boosting, comprising: a first current source circuit that is coupled to a first output node, a first sense node, and a second sense node, wherein the first current source circuit is arranged to respond to a first feedback signal from the second sense node; a second current source circuit that is coupled to a second output node, a third sense node, and a fourth sense node, wherein the second current source circuit is arranged to respond to a second feedback signal from the fourth sense node; a first follower circuit that is coupled between the first sense node and a fifth sense node, wherein the first follower circuit is arranged to respond to a reference signal from a reference node and also respond to a first sense signal from the first sense node; a second follower circuit that is coupled between the third sense node and a sixth sense node, wherein the second follower circuit is arranged to respond to the reference signal from the reference node and also respond to a third sense signal that is received at the third sense node; and a differential amplifier circuit having a first amplifier input, a second amplifier input, a first amplifier output, and a second amplifier output, wherein the first amplifier input is coupled to the fifth sense node, the second amplifier input is coupled to the sixth sense node, the first amplifier output is coupled to the second sense node, and the second amplifier output is coupled to the fourth sense node.