Invention Grant
- Patent Title: Quadrature combining and adjusting
- Patent Title (中): 正交组合和调整
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Application No.: US14465442Application Date: 2014-08-21
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Publication No.: US09088471B1Publication Date: 2015-07-21
- Inventor: Hong Sun Kim , James Ian Jaffee , Paul Sheehy , Jeremy Darren Dunworth , Cheng-Han Wang , Prasad Srinivasa Siva Gudem , Ojas Mahendra Choksi , Jungdong Park
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Patterson & Sheridan, L.L.P.
- Main IPC: H04L5/12
- IPC: H04L5/12 ; H04L27/36 ; H04L27/26 ; H04L27/00

Abstract:
Certain aspects of the present disclosure provide methods and apparatus for performing quadrature combining and adjusting. One example circuit may include first through fourth mixing circuits. The first mixing circuit may multiply a radio frequency signal with a first local oscillating signal to generate a first frequency converted signal. The second mixing circuit may multiply a radio frequency (RF) signal with a second local oscillating signal, which may be about 90° out of phase with the first local oscillating signal, to generate a second frequency converted signal. The third and fourth mixing circuits may multiply the RF signal with the second and first signals, respectively, to generate third and fourth frequency converted signals, respectively. A first combining circuit may combine the first and third frequency converted signals, and a second combining circuit may combine the second and fourth frequency converted signals.
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