Patent ID: 9530771
Filing Date: 2016-12-27
CPC Classification: H01L,H03F,H03G

Claim Text:
1. A radio-frequency amplifier architecture comprising: a radio-frequency amplifier including a first field-effect transistor and a second field-effect transistor arranged in a cascode configuration, each of the first field-effect transistor and the second field-effect transistor having a gate, a source, and a drain, the gate of the first field-effect transistor coupled to an input node for receiving an radio-frequency signal, the drain of the first field-effect transistor coupled to the source of the second field-effect transistor, the drain of the second field-effect transistor coupled to an output node for outputting an amplified radio-frequency signal; a first feedback circuit implemented between the drain of the second field-effect transistor and the gate of the second field-effect transistor, the first feedback circuit configured to provide gain control, the first feedback circuit including a first parallel combination and a second parallel combination connected in series between the drain of the second field-effect transistor and the ground, the first parallel combination including a first resistance parallel with a series combination of a second resistance and a first capacitance, the second parallel combination including a third resistance parallel with a second capacitance, a node between the first and second parallel combinations connected to the gate of the second field-effect transistor; and a second feedback circuit implemented between the drain of the second field-effect transistor and the gate of the first field-effect transistor, the second feedback circuit configured to provide an increase in a frequency range having a desirable range of gain.