Invention Grant
- Patent Title: Frequency changer circuits
- Patent Title (中): 变频器电路
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Application No.: US11562393Application Date: 2006-11-21
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Publication No.: US08099072B2Publication Date: 2012-01-17
- Inventor: Daniel F. Filipovic , Inyup Kang
- Applicant: Daniel F. Filipovic , Inyup Kang
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent Timothy F. Loomis
- Main IPC: H04B1/10
- IPC: H04B1/10 ; H04B1/26

Abstract:
In accordance with one aspect of the disclosure, apparatus are provided. A filter is provided to receive from an antenna a receive signal of a given type and a low noise amplifier is provided to amplify the received signal. A translator down translates the receive signal carried at a radio frequency to be carried at an intermediate frequency. An I/Q channel separator is provided to separate the receive signal carried at the intermediate frequency into an analog in-phase (I) signal in an I channel and an analog quadrature-phase (Q) in a Q channel. An analog-to-digital (A/D) converter is provided to respectively convert the I signal and the Q signal to digital domain representations of the I signal and the Q signal. An intermodulation (IM) distortion avoider is provided to avoid IM distortion in the receive signal. The IM distortion avoider includes a carrier frequency exchanger to exchange an IM carrier frequency of IM distortion contained in the receive signal with a carrier frequency of the receive signal.
Public/Granted literature
- US20080119158A1 FREQUENCY CHANGER CIRCUITS Public/Granted day:2008-05-22
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