Patent ID: 7683715

Claim:
An amplifier to amplify an input signal and generate an amplified output signal, said amplifier comprising: an output portion containing a plurality of active components, which together generate said amplified output signal in response to receiving said input signal and a biasing signal, wherein said biasing signal causes a bias current to flow in said plurality of active components, wherein said bias current is to be at a desired level to ensure that said amplified output signal has distortion below an acceptable threshold; a biasing loop containing a negative feedback loop and a positive feedback loop, wherein said negative feedback loop operates to sense said bias current and to control said biasing signal to correct any variations in said bias current, wherein a higher gain of said negative feedback loop ensures that any deviation of said bias current from said desired level is corrected in a proportionately smaller duration, wherein said positive feedback loop senses the finite gain of said negative feedback loop and compensates for said finite gain.