Operational amplifier with enhanced input slew rate

Abstract

An operational amplifier includes an input stage, a first switch, a second switch and a third switch. The input stage includes a current source and a first differential input pair. The first differential input pair includes a first input transistor and a second input transistor. The first input transistor has a gate terminal. The second input transistor has a gate terminal coupled to an output terminal of the operational amplifier. The first switch is coupled between an input terminal of the operational amplifier and the gate terminal of the first input transistor. The second switch is coupled between the gate terminal of the first input transistor and the gate terminal of the second input transistor. The third switch is coupled to the current source and deployed on a current path of the first differential input pair.

Dependencies are inferred from the claim text.