发明授权
- 专利标题： Synchronizing signal selection circuit
- 专利标题（中）： 同步信号选择电路
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申请号： US742899申请日： 1991-08-08
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公开(公告)号： US5245431A公开(公告)日： 1993-09-14
- 发明人: Hisao Okada , Shigeyuki Uehira , Kuniaki Tanaka , Katumi Miki , Miki Fukuyama
- 申请人： Hisao Okada , Shigeyuki Uehira , Kuniaki Tanaka , Katumi Miki , Miki Fukuyama
- 申请人地址： JPX Osaka
- 专利权人： Sharp Kabushiki Kaisha
- 当前专利权人： Sharp Kabushiki Kaisha
- 当前专利权人地址： JPX Osaka
- 优先权： JPX2-210608 19900808; JPX2-261482 19900928
- 主分类号： H04N5/10
- IPC分类号： H04N5/10
摘要：
In a synchronizing signal selection circuit, in response to the input of a vertical synchronizing signal extracted from a composite synchronizing signal, a control signal is generated. The control signal is in a predetermined state during a period which begins when a first predetermined time period has elapsed after the input of the vertical synchronizing signal, and which terminates when a second predetermined time period has elapsed after the input of the vertical synchronizing signal. The composite synchronizing signal is output when the control signal is in the predetermined state, and a horizontal synchronizing signal separated the composite synchronizing signal is output when the control signal is in a state other than the predetermined state.
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