Patent ID: 7872530

Claim:
An amplifying device comprising: a first transistor having a source connected to a first input signal source for receiving a first half of an input signal, a gate arranged to receive a biasing potential and a drain connected to a first signal output where a first half of an output signal is provided, a first breakable branch connected between the source and drain of the first transistor and comprising a second transistor, a third transistor having a source connected to a second input signal source for receiving a second half of an input signal, a gate arranged to receive a biasing potential and a drain connected to a second signal output where a second half of an output signal is provided, a second breakable branch connected between the source and drain of the third transistor and comprising a fourth transistor, a third breakable branch comprising a first capacitor and a first switch connected between the source of the first transistor and the gate of the third transistor, and a fourth breakable branch comprising a second capacitor and a second switch connected between the source of the third transistor and the gate of the first transistor, wherein said first and second switches are arranged to receive a first switching signal for providing a capacitive cross-coupled mode of operation of the amplifying device and said first and second breakable branches are arranged to receive a second switching signal for connecting the second transistor in parallel with the first transistor and for connecting the fourth transistor in parallel with the third transistor in order to provide a standard common-gate mode of operation of the amplifying device.