Patent ID: 8742800

Claim:
An integrated circuit with precision current source comprising: a first n-channel metal-oxide semiconductor (NMOS) field-effect transistor (MOSFET) formed on a semiconductor substrate and having a first source, a first drain, and a first gate, wherein the first MOSFET is characterized by a first multiplier (xM1) and wherein the first drain is electrically connected to an output node; a second NMOS MOSFET formed on the semiconductor substrate and having a second source, a second drain, and a second gate, wherein the second MOSFET is characterized by a second multiplier (xM2) wherein a ratio of xM2 to xM1 is greater than one and wherein the second drain is electrically connected to the output node and the second source is electrically connected to ground; an operational amplifier (op-amp) formed on the semiconductor substrate having a plus input, a minus input and an output, wherein the output of the op-amp is coupled to the first gate; a first resistor coupling the first gate to the second gate.