Invention Grant
- Patent Title: Spur mitigation for radio frequency receivers utilizing a free-running crystal
- Patent Title (中): 使用自由运行的晶体的射频接收器的减噪
-
Application No.: US13166507Application Date: 2011-06-22
-
Publication No.: US08542784B2Publication Date: 2013-09-24
- Inventor: Farzad Etemadi , Massoud Kahrizi
- Applicant: Farzad Etemadi , Massoud Kahrizi
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- Main IPC: H04L27/06
- IPC: H04L27/06

Abstract:
Embodiments of a receiver for using a first oscillator signal provided by a crystal resonator to support multiple, different functionalities are provided. The receiver comprises a phase-locked loop (PLL) configured to provide a second oscillator signal based on the first oscillator signal provided by the crystal resonator; a first mixer configured to mix a received signal received over a first input path with the second oscillator signal received over a second input path to provide a first frequency-shifted signal; and an automatic frequency controller (AFC) configured to estimate a frequency offset of the second oscillator signal and adjust the PLL to compensate for the frequency offset. The receiver further can include solutions for mitigating potential sources of noise caused by the frequency of the first oscillator signal not being compensated for by the AFC.
Public/Granted literature
- US20120328052A1 Spur Mitigation For Radio Frequency Receivers Utilizing A Free-Running Crystal Public/Granted day:2012-12-27
Information query