Adapting operational amplifier frequency response respective to closed loop gain

摘要

Methods and apparatuses relating to current and gain adjustment in an amplifier. A gain of an amplifier, e.g., closed loop gain, may be increased or decreased based on a swing of a received signal. A current of an internal amplifier stage may be increased or decreased in relation to the increasing or decreasing of the gain to provide adjustments to bandwidth and/or frequency response. In one embodiment a programmable gain amplifier having operational amplifier has a variable feedback resistor increased/decreased in steps and a bias current of a differential stage of the operational amplifier may be increased/decreased in proportional steps.