Receiver circuit and filtering method used therein

Patent metadata

Field	Value
Publication number	US-9106491-B2
Application number	US-201214008614-A
Country	US
Kind code	B2
Filing date	Mar 28, 2012
Priority date	Mar 28, 2011
Publication date	Aug 11, 2015
Grant date	Aug 11, 2015

Abstract

A receiver circuit includes a first mixer that performs frequency conversion on a first signal containing a first frequency entered from outside to output the resulting frequency-converted first signal, and a first selector that selects one out of an output signal of the first mixer and a second signal containing a second frequency entered from outside. A filter removes a pre-set frequency band of the signal selected by the first selector, and a second selector selects between outputting the signal removed of the frequency band to outside and outputting the signal to a subsequent side circuit. A second mixer performs frequency conversion of the signal output from the second selector to output the resulting frequency-converted signal. The second mixer is the subsequent side circuit. The second frequency has a carrier frequency of a radio signal.

First claim

What is claimed is:

1. A receiver circuit, comprising:
a first mixer that performs frequency conversion on a first component of a first signal containing a first frequency, entered from outside, to output a resulting frequency-converted first component of the first signal;
a second mixer that performs frequency conversion on a second component of the first signal to output a resulting frequency-converted second component of the first signal;
a first selector that selects the f…

Assignees

• Kitsunezuka Masaki
• Nec Corp

Inventors

• Kitsunezuka Masaki

Classifications

• H04L27/148 Primary

  Electricity · mapped topic

• H04B1/28 Primary

  Electricity · mapped topic