Patent ID: 6484042
Filing Date: 2002-11-19
Classification: H03D,H03G,H04L

Abstract:
A wireless communications device, comprising:an antenna to receive a radio signal at a first frequency and to convert it into a radio frequency (RF) signal of the first frequency; a frequency conversion circuit 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 occupying a baseband; and a control circuit having 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 comprising 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, wherein each feedback loop includes a detector configured to generate a detector signal indicative of a signal level of one of the amplified first and second signal components, wherein the feedback loop further includes a difference amplifier configured to generate an error signal indicative of a difference between the detector signal, and the reference signal.