公开(公告)号：US11442142B2

公开(公告)日：2022-09-13

申请号：US16795977

申请日：2020-02-20

Applicant: STMicroelectronics S.r.l.

Inventor： Giuseppe Papotto ,  Egidio Ragonese ,  Claudio Nocera ,  Alessandro Finocchiaro ,  Giuseppe Palmisano

IPC: G01S7/03 ,  H03F1/56 ,  G01S7/02 ,  H03D7/14 ,  H03F3/19

Abstract: An input receives a radio frequency (RF) signal having an interfering component superimposed thereon. The RF signal is mixed with a local oscillator (LO) signal and down-converted to an intermediate frequency (IF) to generate a mixed signal which includes a frequency down-converted interfering component. The mixed signal is amplified by an amplifier to generate an output signal. A feedback loop processes the output signal to generate a correction signal for cancelling the frequency down-converted interfering component at the input of the amplifier. The feedback loop includes a low-pass filter and a amplification circuit which outputs the correction signal.