Invention Grant
- Patent Title: Dual frequency receiver with single I/Q IF pair and mixer
- Patent Title (中): 具有单个I / Q IF对和混频器的双频接收器
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Application No.: US12897039Application Date: 2010-10-04
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Publication No.: US08427366B2Publication Date: 2013-04-23
- Inventor: Saravana Kumar Ganeshan , Bijoy Bhukania , Anand Kannan
- Applicant: Saravana Kumar Ganeshan , Bijoy Bhukania , Anand Kannan
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Lawrence J. Bassuk; W. James Brady; Frederick J. Telecky, Jr.
- Priority: IN2131/CHE/2010 20100727
- Main IPC: G01S19/33
- IPC: G01S19/33 ; G01S19/09

Abstract:
A wireless receiver for multiple frequency bands reception includes a single receive radio frequency (RF) circuit (160, 170) having an RF bandpass substantially confined to encompass at least two non-overlapped such frequency bands at RF, a single in-phase and quadrature (approximately I, Q) pair of intermediate frequency (IF) sections (120I, 120Q) having an IF passband, and a mixer circuit (110) including an in-phase and quadrature (I,Q) pair of mixers (110I, 110Q) fed by said RF circuit (160, 170) and having a local oscillator (100) with in-phase and quadrature outputs coupled to said mixers (110I, 110Q) respectively, said mixer circuit (110) operable to inject and substantially overlap the at least two non-overlapped frequency bands with each other into the IQ IF sections (120I, 120Q) in the IF passband, the IF passband substantially confined to a bandwidth encompassing the thereby-overlapped frequency bands.
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