发明授权
- 专利标题: Television synchronous receiver
- 专利标题(中): 电视同步接收机
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申请号: US379994申请日: 1982-05-19
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公开(公告)号: US4461035A公开(公告)日: 1984-07-17
- 发明人: Yoichi Sakamoto
- 申请人: Yoichi Sakamoto
- 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: JPX56-78215 19810522; JPX56-100270 19810626
- 主分类号: H04N5/455
- IPC分类号: H04N5/455 ; H03J7/02 ; H04N5/50
摘要:
A television synchronous receiver is arranged to maintain a 90.degree. phase difference in the broad frequency band of a TV broadcast between a local oscillator signal and another local oscillator signal. This allows a pair of synchronous detectors to detect the in phase components and quadrature components of a received television broadcast signal. A Costas loop is utilized in the generation of the 90.degree. phase difference.