Patent ID: 8766725
Filing Date: 2014-07-01
Classification: H03F

Abstract:
1. An integrated circuit (IC), comprising: an amplifier configured to amplify an input signal to generate an output signal, wherein the amplifier comprises a first inverting amplification block; a first compensation capacitor electrically connected between an input of the first inverting amplification block and an output of the first inverting amplification block; an output pad configured to receive the output signal from the amplifier; a control pad configured to control a closed-loop bandwidth of the amplifier, wherein the control pad is separate from the input of the first inverting amplification block; and a first switchable capacitor electrically connected between the input of the first inverting amplification block and the control pad, wherein the first switchable capacitor is an explicit capacitor, wherein the amplifier is configurable between a first feedback configuration having a first closed-loop gain and a second feedback configuration having a second closed-loop gain that is less than the first closed-loop gain, and wherein the control pad is electrically connected to a DC voltage source when the amplifier is in the first feedback configuration, and wherein the control pad is electrically connected to the output pad when the amplifier is in the second feedback configuration to provide frequency compensation to the amplifier by increasing an effective capacitance of the first switchable capacitor, and wherein the amplifier is configurable between the first feedback configuration and the second feedback configuration using a first external resistor and a second external resistor.