A communications device includes a frequency conversion circuit and a control
circuit.
An antenna receives a radio signal at a first frequency and converts it into a
radio frequency (RF) signal of the first frequency. The frequency conversion circuit
is associated with the antenna and configured to convert the RF signal into a first
signal component and a second signal component. The first and second signal components
occupy a baseband. The control circuit has first ports connected to the frequency
conversion circuit to receive the first and second signal components and second
ports connected to a processor circuit to output amplified first and second signal
components, and separate channels for the first and second signal components existing
between the first and second ports. Each channel comprises an amplifier and a feedback
loop configured to control the amplifier as a function of a reference signal and
a control signal derived from the RF signal. The communications device may be a
cellular phone comprising a direct conversion module.
