Patent ID: 7982542

Claim:
A circuit comprising: a first amplifier portion comprising: a first transistor having a first current electrode coupled to a first input, a second current electrode, and a control electrode; a second transistor having a first current electrode coupled to the first input, a second current electrode, and a control electrode coupled to the control electrode of the first transistor; a current mirror coupled to the second current electrodes of the first and second transistors; and a first filter coupled between the first input and the control electrodes of the first and second transistors; and a second amplifier portion comprising: a third transistor having a first current electrode coupled to a second input, a second current electrode, and a control electrode coupled to the second current electrode of the third transistor; a fourth transistor having a first current electrode coupled to the second input, a second current electrode coupled to an output terminal, and a control electrode coupled to the control electrode of the third transistor; a first current source having a first terminal coupled to the third transistor, and a second terminal; a second current source having a first terminal coupled to the fourth transistor, and a second terminal; and a second filter coupled between the second input and the control electrodes of the third and fourth transistors, and wherein the first and second filters are coupled together.