Patent ID: 7697915

Claim:
An apparatus comprising: a differentially arranged radio frequency (RF) amplifier stage having a first input node and a first output node associated with a first amplification branch of the differentially arranged RF amplifier stage, in which a first input transistor and a first cascode transistor are coupled in series between the first output node and a common leg of the RF amplifier stage, and a second input node and a second output node associated with a second amplification branch of the differentially arranged RF amplifier stage, in which a second input transistor and a second cascode transistor are coupled in series between the second output node and the common leg of the RF amplifier stage, the amplifier stage also having a first inductive load coupled to the first output node and a second inductive load coupled to the second output node; and a cross-coupled capacitor network, having a first capacitor coupled between a gate of the first input transistor at the first input node and a drain of the second cascode transistor at the second output node and a second capacitor coupled between a gate of the second input transistor at the second input node and a drain of the first cascode transistor at the first output node, to provide gain boost of an input signal to the RF amplifier stage.