Invention Grant
US07697905B2 Local oscillator feedthrough cancellation scheme to remove RF and baseband offsets
失效
本地振荡器馈通消除方案,以消除RF和基带偏移
- Patent Title: Local oscillator feedthrough cancellation scheme to remove RF and baseband offsets
- Patent Title (中): 本地振荡器馈通消除方案,以消除RF和基带偏移
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Application No.: US11303235Application Date: 2005-12-16
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Publication No.: US07697905B2Publication Date: 2010-04-13
- Inventor: C. Paul Lee , Arya Behzad
- Applicant: C. Paul Lee , Arya Behzad
- Applicant Address: US CA San Diego
- Assignee: Qualcomm Incorporation
- Current Assignee: Qualcomm Incorporation
- Current Assignee Address: US CA San Diego
- Agent Stanton Braden
- Main IPC: H04B1/04
- IPC: H04B1/04

Abstract:
An scheme to provide local oscillator feedthrough offset cancellation to remove baseband and radio frequency coupled offsets. Two separate offset cancellation currents are injected at a driver which drives a baseband signal into a mixer to mix with a local oscillator signal. One offset cancellation current cancels a baseband local oscillator feedthrough offset, while the other offset cancellation current cancels a radio frequency local oscillator feedthrough offset.
Public/Granted literature
- US20060094395A1 Local oscillator feedthrough cancellation scheme to remove RF and baseband offsets Public/Granted day:2006-05-04
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