基本信息:
- 专利标题： 同步信号撷取器
- 专利标题（英）：Acquisition device for synchronization signal
- 申请号：CN200710180261.6 申请日：2007-10-16
- 公开(公告)号：CN101415070B 公开(公告)日：2010-10-27
- 发明人： 蔡瑞原 , 陈思平 , 周裕彬
- 申请人： 瑞昱半导体股份有限公司
- 申请人地址： 中国台湾新竹科学园区
- 专利权人： 瑞昱半导体股份有限公司
- 当前专利权人： 瑞昱半导体股份有限公司
- 当前专利权人地址： 中国台湾新竹科学园区
- 代理机构： 北京市柳沈律师事务所
- 代理人： 蒲迈文
- 主分类号： H04N5/04
- IPC分类号： H04N5/04 ; H03K5/24
The invention provides a sync signal extractor which comprises a transistor, a resistance, a clamper, a simulation multiplexer and a comparator. Under a mixed horizontal sync signal mode, when a machine is just started, a circuit does not have a sync signal HS; therefore, the sync signal extractor uses a known circuit to capture the mixed sync signal at first, so as to be convenient for other circuits to generate a sync signal and a clamping signal. Then, a mode selection signal is used to convert the simulation multiplexer to a forced clamping mode; at the moment, as the output voltage of the clamper is set by a user and is not set by the technique, a DC voltage value is easier to control and is difficult to shift with the change of the technique and the temperature.
公开/授权文献:
- CN101415070A 同步信号撷取器 公开/授权日：2009-04-22