Patent ID: 6915141

Claim:
An apparatus, comprising: a frequency conversion circuit configured to convert a first signal having a first frequency into a first signal component and a second signal component, the first and second signal components having a second frequency which is lower than the first frequency; and a control circuit having first ports connected to the frequency conversion circuit to receive the first and second signal components and second ports connectable to a processor circuit to output amplified first and second signal components, comprising: a first channel for the first signal component existing between the first and second ports, wherein the first channel comprises a first amplifier and a first feedback loop configured to control the first amplifier as a function of a reference signal and a control signal, the first feedback loop not configured to control the first amplifier as a function of the second signal component; and a second channel for the second signal component existing between the first and second ports, wherein the second channel comprises a second amplifier and a second feedback loop configured to control the second amplifier as a function of the reference signal, and the control signal, the second feedback loop not configured to control the second amplifier as a function of the first signal component.