Patent ID: 8463226

Claim:
An amplifier circuit comprising: a first common-source amplification stage having a first amplification stage output, the first common-source amplification stage being configured to generate a first amplified signal at the first amplification stage output; a second common-source amplification stage having a second amplification stage input and a second amplification stage output, the second amplification stage input being coupled to the first amplification stage output, the second common-source amplification stage being configured to generate a second amplified signal at the second amplification stage output based on the first amplified signal, wherein: the first common-source amplification stage is coupled to a first reference voltage node; the second common-source amplification stage is coupled to a second reference voltage node; and the first common-source amplification stage and the second common-source amplification stage are configured such that a current between the first reference voltage node and the second reference voltage node flows in series through the first common-source amplification stage and the second common-source amplification stage; a first tank circuit coupled between the first amplification stage output and a third reference voltage node; and a second tank circuit coupled between the second amplification stage output and the third reference voltage node.