Invention Grant
US08364100B2 Method and system for a transmitter loft cancellation scheme that maintains IQ balance
有权
用于维持智商平衡的发射机顶棚取消方案的方法和系统
- Patent Title: Method and system for a transmitter loft cancellation scheme that maintains IQ balance
- Patent Title (中): 用于维持智商平衡的发射机顶棚取消方案的方法和系统
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Application No.: US12792905Application Date: 2010-06-03
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Publication No.: US08364100B2Publication Date: 2013-01-29
- Inventor: Meng-An Pan
- Applicant: Meng-An Pan
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Thomas|Horstemeyer, LLP.
- Main IPC: H04B1/04
- IPC: H04B1/04

Abstract:
Methods and systems for a transmitter LOFT cancellation scheme that maintains IQ balance are disclosed. Aspects of one method may include providing current compensation to both differential inputs of a mixer for each of I and Q channels. An initial current compensation of X units may be provided, followed by subsequent compensation as needed. The initial compensation may be provided to each differential input of the mixers used for I and Q channels. The subsequent current compensation for the I channel may be independent of the subsequent current compensation for the Q channel. Subsequent current compensation to a first differential input for a mixer may be increased by Y units while decreasing current compensation to the second differential input of the mixer by Y units. In this manner, the DC common mode level for the mixer may remain the same at the initial DC compensation current of X units for both mixers.
Public/Granted literature
- US20100311366A1 METHOD AND SYSTEM FOR A TRANSMITTER LOFT CANCELLATION SCHEME THAT MAINTAINS IQ BALANCE Public/Granted day:2010-12-09
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