发明授权
- 专利标题: Signal receiver having automatic frequency characteristic adjusting capability
- 专利标题(中): 具有自动频率特性调整功能的信号接收机
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申请号: US877451申请日: 1986-06-23
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公开(公告)号: US4780909A公开(公告)日: 1988-10-25
- 发明人: Seiji Sakashita , Kiyotake Fukui
- 申请人: Seiji Sakashita , Kiyotake Fukui
- 申请人地址: JPX Osaka
- 专利权人: Matsushita Electric Industrial Co. Ltd.
- 当前专利权人: Matsushita Electric Industrial Co. Ltd.
- 当前专利权人地址: JPX Osaka
- 优先权: JPX60-145505 19850702; JPX60-145513 19850702
- 主分类号: H04B1/14
- IPC分类号: H04B1/14 ; H03J1/00 ; H03J3/06 ; H03J5/02 ; H04B1/26
摘要:
A signal receiver generates a reference signal that sweeps frequencies of desired channel bands, and then feeds the reference signal to an input terminal of receiver unit via a signal-switching circuit that performs switching of the desired-channel signal and the reference signal. The signal receiver then detects the signal strength present in plural frequencies of intermediate frequencies delivered to an output terminal of the reference signal, and after storing detected signal data in a memory, the signal receiver compares the detected signal data to desired frequency characteristics. Then, the signal receiver determines tuning voltages of respective tuning circuits so that the differences which arose from the comparison can be minimized. After determining the tuning voltages, these voltages are delivered to respective tuning circuits, and then a switching operation between the reference signal and the desired channel signal is executed before the signal receiver eventually receives the switched signal.
公开/授权文献
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