Invention Grant
- Patent Title: Trimming of local oscillation in an integrated circuit radio
- Patent Title (中): 在集成电路收音机中修整本地振荡
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Application No.: US11516413Application Date: 2006-09-05
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Publication No.: US07580483B2Publication Date: 2009-08-25
- Inventor: Brima B. Ibrahim , Henrik T. Jensen
- Applicant: Brima B. Ibrahim , Henrik T. Jensen
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Garlick Harrison & Markison
- Main IPC: H04L27/14
- IPC: H04L27/14 ; H04L27/16 ; H04L27/22

Abstract:
A method and apparatus for trimming of a local oscillation within a radio frequency integrated circuit (RFIC) includes processing that begins when an RFIC receives a radio frequency (RF) signal having a known frequency. The processing then continues when the RFIC mixes the RF signal with a receiver local oscillation to produce a low intermediate frequency (IF) signal, which may have a carrier frequency of zero (i.e., a baseband signal) or up to a few mega Hertz). The processing then continues when the RFIC demodulates the low IF signal to produce demodulated data. The processing then continues as the RFIC determines a DC offset from the demodulated data, where the DC offset is reflective of the difference between the known frequency and the frequency of the receiver local oscillation. The processing then continues as the RFIC adjusts the receiver local oscillation to reduce the DC offset when the DC offset compares unfavorably with an allowable offset threshold.
Public/Granted literature
- US20070002974A1 Trimming of local oscillation in an integrated circuit radio Public/Granted day:2007-01-04
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