Invention Grant
- Patent Title: Feedback loop for direct current (DC) offset removal
- Patent Title (中): 用于直流（DC）偏移去除的反馈回路
-
Application No.: US14056108Application Date: 2013-10-17
-
Publication No.: US09287839B1Publication Date: 2016-03-15
- Inventor: Christophe Jean-Francois Amadi , Jason Lee Wardlaw , Emmanuel A. Marchais , Dylan Alexander Hester , Daniel John Allen , John Christopher Tucker
- Applicant: Cirrus Logic, Inc.
- Applicant Address: US TX Austin
- Assignee: CIRRUS LOGIC, INC.
- Current Assignee: CIRRUS LOGIC, INC.
- Current Assignee Address: US TX Austin
- Agency: Norton Rose Fulbright US LLP
- Main IPC: H03F3/45
- IPC: H03F3/45 ; H03F1/34 ; H03F1/02 ; H03G3/32
Abstract:
A DC servo loop may track DC offset changes of an input signal and apply feedback to amplifiers to adjust a DC offset of the input signal. The DC servo loop may include digital loop tracking and analog loop tracking components. The digital loop tracking components may track small changes in the DC offset. When the DC offset exceeds a certain threshold, analog loop tracking may be activated to apply feedback to the amplifiers to adjust the DC offset. The adjustments to the DC offset may be delayed until an amplitude of the input signal exceeds a threshold to reduce contribution to noise in the input signal.
Information query
