公开(公告)号：US07847597B1

公开(公告)日：2010-12-07

申请号：US12456287

申请日：2009-06-15

申请人： Yat C. Chan ,  James C. Camparo ,  Walter A. Johnson ,  Christine Humphries, legal representative ,  Albert M. Young ,  Sarunas K. Karuza

发明人： Yat C. Chan ,  James C. Camparo ,  Walter A. Johnson ,  Albert M. Young ,  Sarunas K. Karuza

IPC分类号： G01R23/02 ,  H03D3/00 ,  H03K9/06

CPC分类号： G01R29/26 ,  G01R23/00 ,  G01R23/14 ,  G01R25/00

摘要： A frequency change detector splits a frequency standard signal into two undelayed frequency signals, one of which is delayed by a predetermined amount. The delayed signal is then mixed with the undelayed frequency signal into a mixed signal that is further filtered and amplified for providing an output signal indicating frequency changes of the frequency standard signal. The mixed frequency signal indicates frequency changes of the original frequency standard signal without reference to another frequency standard. This frequency change detector is well suited for use on satellites as an early warning detection of changes in on-board atomic frequency standards.

摘要翻译： 频率变化检测器将频率标准信号分成两个未延迟的频率信号，其中一个延迟了预定的量。 然后将延迟的信号与未延迟的频率信号混合成混合信号，该混合信号被进一步滤波和放大，以提供指示频率标准信号的频率变化的输出信号。 混频信号表示原频率标准信号的频率变化，不参考另一频率标准。 该频率变化检测器非常适合用于卫星，作为车载原子频率标准变化的早期预警检测。