公开(公告)号：EP0237167A2

公开(公告)日：1987-09-16

申请号：EP87300856.9

申请日：1987-01-30

申请人： RCA Thomson Licensing Corporation

发明人： Testin, William John ,  Tults, Juri

IPC分类号： H04N5/50

CPC分类号： H04N5/50

摘要： In a tuning control system for a television receiver, an analog AFT signal is sampled during blanking intervals when the amplitude of the video carrier is relative constant and therefore cannot affect the amplitude of the AFT signal significantly. This reduces the AFT filtering requirements.

摘要翻译： 在用于电视接收机的调谐控制系统中，当视频载波的幅度相对恒定时，在消隐间隔期间对模拟AFT信号进行采样，因此不能显着地影响AFT信号的幅度。 这降低了AFT过滤要求。

公开(公告)号：EP0237167B1

公开(公告)日：1993-09-22

申请号：EP87300856.9

申请日：1987-01-30

申请人： RCA Thomson Licensing Corporation

发明人： Testin, William John ,  Tults, Juri

IPC分类号： H04N5/50

CPC分类号： H04N5/50

公开(公告)号：EP0237167A3

公开(公告)日：1989-10-25

申请号：EP87300856.9

申请日：1987-01-30

申请人： RCA Thomson Licensing Corporation

发明人： Testin, William John ,  Tults, Juri

IPC分类号： H04N5/50

CPC分类号： H04N5/50

摘要： In a tuning control system for a television receiver, an analog AFT signal is sampled during blanking intervals when the amplitude of the video carrier is relative constant and therefore cannot affect the amplitude of the AFT signal significantly. This reduces the AFT filtering requirements.