Patent ID: 7215201

Claim:
An amplifier circuit, comprising: an n-type transistor having: a source; a gate coupled to a first bias voltage; a drain coupled to a first supply rail voltage through a first impedance circuit; a p-type transistor having: a source coupled to the source of the n-type transistor; a gate coupled to a second bias voltage; a drain coupled to a second supply rail voltage through a second impedance circuit; a first differential input coupled to the gate of the n-type transistor through a first capacitor and to the gate of the p-type transistor through a second capacitor; a second differential input coupled to the sources of the n-type and the p-type transistors; a third capacitor having a first end coupled to the drain of the n-type transistor; a fourth capacitor having a first end coupled to the drain of the p-type transistor and a second end coupled to a second end of the third capacitor; and an output of the amplifier circuit being provided at the second ends of the third and the fourth capacitors.