公开(公告)号：US20240313751A1

公开(公告)日：2024-09-19

申请号：US18589715

申请日：2024-02-28

Applicant: Texas Instruments Incorporated

Inventor： Sachin AITHAL ,  Anand H UDUPA ,  Raja Reddy PATUKURI ,  Sandeep OSWAL ,  Aatish CHANDAK ,  Vignesh SUBRAMANYA ,  Aravind MIRIYALA

IPC: H03K5/1252 ,  A61B5/00 ,  A61B5/349 ,  H03M1/12

CPC classification number: H03K5/1252 ,  A61B5/349 ,  A61B5/7217 ,  H03M1/12

Abstract: A circuit includes an interference frequency tracking circuit, a PLI synthesizer circuit, and a summing circuit. The interference frequency tracking circuit is configured to track a frequency of an interference signal derived from a target signal, and provide a frequency selection value representing the frequency of the interference signal. The PLI synthesizer circuit is configured to generate, based on the frequency selection value, a correction signal at the frequency of the interference signal, adjust a phase of the correction signal to match a phase of the interference signal in the target signal, and adjust an amplitude of the correction signal to match an amplitude of the interference signal in the target signal. The summing circuit is configured to subtract the correction signal from the target signal.