Invention Grant
- Patent Title: Intermediate frequency receiving circuit and intermediate frequency receiving method
- Patent Title (中): 中频接收电路和中频接收方法
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Application No.: US12485161Application Date: 2009-06-16
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Publication No.: US08009076B2Publication Date: 2011-08-30
- Inventor: Guixue Zhao
- Applicant: Guixue Zhao
- Applicant Address: CN Shenzhen
- Assignee: Huawei Technologies Co., Ltd.
- Current Assignee: Huawei Technologies Co., Ltd.
- Current Assignee Address: CN Shenzhen
- Agency: Leydig, Voit & Mayer, Ltd.
- Priority: CN200710107958 20070518
- Main IPC: H03M1/12
- IPC: H03M1/12

Abstract:
An intermediate frequency receiving circuit and an intermediate frequency receiving method are provided. The intermediate frequency receiving circuit includes an inductor-capacitor (LC) resonance circuit whose primary resonance frequency is a central frequency of received signals. The LC resonance circuit receives intermediate frequency signals and suppresses transmitted signals and control signals. A band-pass filter connected to the LC resonance circuit filters the transmitted signals and control signals. An automatic gain control circuit connected to the band-pass filter compensates the attenuation of an intermediate frequency cable. A low-pass filter connected to the automatic gain control circuit compensates an in-band flatness. An analog-to-digital converter connected to the low-pass filter performs a sampling and digital demodulation on the received signals.
Public/Granted literature
- US20090251348A1 INTERMEDIATE FREQUENCY RECEIVING CIRCUIT AND INTERMEDIATE FREQUENCY RECEIVING METHOD Public/Granted day:2009-10-08
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