GAIN REDUCTION TECHNIQUES FOR RADIO-FREQUENCY AMPLIFIERS

A radio-frequency amplifier (51) may include input transistors (M1, M2) cross-coupled with capacitance neutralization transistors (M4, M4) and/or coupled to cascode transistors (Mcas1, Mcas2). One or more n-type gain adjustment transistors (Madj1, Madj2) may be coupled to source terminals of the capacitance neutralization transistors (M4, M4). One or more p-type gain adjustment transistors (Madj') may be coupled to source terminals of the cascode transistors (Mcas1, Mcas2). One or more processors (88) can selectively activate one or more of the gain adjustment transistors (Madj1, Madj2) to reduce the gain of the radio-frequency amplifier (51) without degrading noise performance and without altering the in-band frequency response of the radio-frequency amplifier (51).