Patent ID: 7724077

Claim:
A stacked cascode current source comprising: an input node; an output node; a first transistor having a first drain terminal coupled to the input node, a first gate terminal coupled to the input node, and a first source terminal; a second transistor having a second drain terminal coupled to the first source terminal, a second gate terminal coupled to the input node, and a second source terminal; a third transistor having a third drain terminal coupled to the second source terminal, and a third gate terminal coupled to the first source terminal; a fourth transistor having a fourth drain terminal coupled to the output node, a fourth gate terminal coupled to the first gate terminal, and a fourth source terminal; a fifth transistor having a fifth drain terminal coupled to the fourth source terminal, a fifth gate terminal coupled to the second gate terminal, and a fifth source terminal; and a sixth transistor having a sixth drain terminal coupled to the fifth source terminal, and a sixth gate terminal coupled to the third gate terminal.