Circuit with source follower output stage and adaptive current mirror bias

A source follower output stage circuit with adaptive current mirror bias, comprising:

• a common source difference amplifier device including a source follower transistor device, an output mirror circuit device, a sense transistor device, and a first current source device, wherein said source follower transistor device has a first voltage that is measured at a first voltage node and said sense transistor device has a second voltage that is measured at a second voltage node;
• a second mirror circuit device, wherein the second voltage is input into the second mirror circuit device and the first voltage is output from the second mirror circuit device;
• a first node common to the second mirror circuit device, the sense transistor device, and an output of the output mirror circuit device, wherein said first node has a common voltage;
• an input device for inputting two input currents, wherein one of said input currents is input at said first voltage node, and the second input current is input at said second voltage node;
• a second current source device at said first node;
• such that the common source difference amplifier device adjusts said common voltage such that the first voltage of the source follower transistor device is equal to the second voltage of the sense transistor device and the effect on a source follower output voltage is minimized with variations in supply voltage, temperature and output load current.