Patent ID: 8786364

Claim:
An amplifier, comprising: a first transistor and a second transistor; a third transistor and a fourth transistor, a source of the third transistor coupled to a drain of the first transistor, a gate of the third transistor directly coupled to a drain of the third transistor, a source of the fourth transistor coupled to a drain of the second transistor, a gate of the fourth transistor directly coupled to a drain of the fourth transistor, and a fifth transistor and a sixth transistor, a source of the fifth transistor coupled to the drain of the first transistor, a drain of the fifth transistor coupled to the drain of the third transistor, a source of the sixth transistor coupled to the drain of the second transistor, a drain of the sixth transistor coupled to the drain of the fourth transistor, wherein a gate of the fifth transistor is coupled to the drains of the fourth and sixth transistors and a gate of the sixth transistor is coupled to the drains of third and fifth transistors.