Performing image rejection on bandpass signals

Patent metadata

Field	Value
Publication number	US-9036740-B2
Application number	US-201313921375-A
Country	US
Kind code	B2
Filing date	Jun 19, 2013
Priority date	Jun 19, 2013
Publication date	May 19, 2015
Grant date	May 19, 2015

Abstract

An image rejection (IR) circuit is configured to receive a complex signal from a radio frequency (RF) mixer, where the complex signal includes an in-phase signal portion and a quadrature signal portion. This IR circuit may include: an in-phase path to remove first mismatch information from the in-phase signal portion and associated with at least one in-phase multi-tap filter; a quadrature path to remove second mismatch information from the quadrature signal portion and associated with at least one quadrature multi-tap filter; and a correlation unit to independently update each of the multiple taps of the in-phase multi-tap filter and the quadrature multi-tap filter according to a priority scheme.

First claim

What is claimed is:

1. An apparatus comprising:
a signal channel path including a first mixer to receive a radio frequency (RF) signal and to downconvert the RF signal to a complex intermediate frequency (IF) signal including an in-phase portion and a quadrature portion;
an image rejection calibration circuit to receive the in-phase portion and the quadrature portion and including:
a first filter to receive a value of the in-phase portion and to generate a first filtered in-pha…

Assignees

• Silicon Lab Inc

Inventors

• Khoury John
• Zhou Yan

Classifications

• H03D1/04 Primary

  Electricity · mapped topic

• H03D7/165

  Electricity · mapped topic

• H03D7/18

  Electricity · mapped topic