Invention Grant
- Patent Title: DC offset calibration of wireless receivers
-
Application No.: US14565745Application Date: 2014-12-10
-
Publication No.: US10079647B2Publication Date: 2018-09-18
- Inventor: Khurram Waheed
- Applicant: FREESCALE SEMICONDUCTOR, INC.
- Applicant Address: US TX Austin
- Assignee: NXP USA, Inc.
- Current Assignee: NXP USA, Inc.
- Current Assignee Address: US TX Austin
- Main IPC: H03G3/20
- IPC: H03G3/20 ; H04L27/08 ; H04B17/21 ; H03G3/00 ; H03G3/30

Abstract:
A receiver system includes an automatic gain control (AGC) module configured to control a first gain control signal to a first gain element having variable gain control. The receiver system also includes a DC (direct current) offset correction block coupled to the AGC module, the DC offset correction block configured to trigger the AGC module to output a set of calibration gain control signals to the first gain element and capture a set of DC offset measurements of a first signal received at the DC offset correction block, where the first signal is passed by the first gain element. The DC offset correction block is further configured to estimate one or more DC offset components using the set of DC offset measurements, and calculate a first correction control signal corresponding to a first gain level of the first gain element using the one or more DC offset components.
Public/Granted literature
- US20160173048A1 DC OFFSET CALIBRATION OF WIRELESS RECEIVERS Public/Granted day:2016-06-16
Information query