Invention Grant
- Patent Title: System and method for zero intermediate frequency filtering of information communicated in wireless networks
- Patent Title (中): 在无线网络中传送的信息的零中频滤波系统和方法
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Application No.: US11399536Application Date: 2006-04-07
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Publication No.: US07881690B2Publication Date: 2011-02-01
- Inventor: Marc Dubois , Stephen Rayment , Andrew Keir , Kieran Parsons
- Applicant: Marc Dubois , Stephen Rayment , Andrew Keir , Kieran Parsons
- Applicant Address: CA
- Assignee: Belair Networks Inc.
- Current Assignee: Belair Networks Inc.
- Current Assignee Address: CA
- Agency: Katten Muchin Rosenman LLP
- Main IPC: H04B1/10
- IPC: H04B1/10

Abstract:
A circuit for communicating information in a wireless network includes a filtering circuit in communication with a zero intermediate frequency (ZIF) transceiver circuit. The filtering circuit includes a first mixer in communication with an output of the ZIF transceiver circuit. The filtering circuit includes a first Surface Acoustic Wave (SAW) filter circuit in communication with an output of the first mixer. The filtering circuit includes a second mixer in communication with an output of the first SAW filter circuit. The filtering circuit includes a third mixer, and a second SAW filter circuit in communication with an output of the third mixer. The filtering circuit includes a fourth mixer in communication with an output of the second SAW filter circuit and an input of the ZIF transceiver circuit. The filtering circuit also includes a local oscillator circuit in communication with the first, second, third and fourth mixers.
Public/Granted literature
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