Single-input class-ab rail-to-rail output stage

A single-input class-AB output stage comprising:

• a current-splitting stage comprising:
• a signal current;
• a tail current, the signal current and tail current together forming a splitting-stage current;
• a first cascode three-node transistor wherein the first node receives a cascode biasing voltage, the second node is driven by the splitting-stage current, and the third node provides a first intermediate output current;
• and
• a second cascode three-node transistor wherein the first node is biased to the cascode biasing voltage, the second node is driven by the splitting-stage current, and the third node provides a second intermediate output current;
• whereby the splitting-stage current is split between the second nodes of the cascode transistors and whereby each cascode transistor provides at its third node a current substantially identical to the current provided at its second node;
• and
• a drive stage comprising a first intermediate input current receiving the first intermediate output current of the current-splitting stage and a second intermediate input current receiving the second intermediate output current of the current-splitting stage, the first intermediate input current driving a first output three-node transistor and the second intermediate input current driving a second output three-node transistor.