公开(公告)号：US3820113A

公开(公告)日：1974-06-25

申请号：US31491172

申请日：1972-12-14

申请人： HOLLANDS SIGNAALAPPARATEN NV

发明人： GELLEKINK B ,  CLEMENS T

IPC分类号： G01S13/44 ,  G01S13/66 ,  G01S13/70 ,  G01S9/16

CPC分类号： G01S13/66

摘要： A target take-over circuit, being aligned with estimated target positions, causes a wide range gate to follow up a series of estimated range values. Each of these values render a counter position, which is compared with a previous reduced counter position to obtain a timing interval. During this interval the access to each of the range gate channels is enabled and disabled successively, while the range gate channel, supplied with a video signal, delivers a square-wave reference voltage, of which the duration corresponds with the target range, valid at the moment of detection. The range servo follows up said voltage, whereupon a tracking system is actuated.