发明申请
- 专利标题: Analog electronic clock
- 专利标题(中): 模拟电子钟
-
申请号: US10582489申请日: 2004-11-29
-
公开(公告)号: US20070115760A1公开(公告)日: 2007-05-24
- 发明人: Isao Kitazawa , Akiyoshi Murakami , Haruhiko Higuchi
- 申请人: Isao Kitazawa , Akiyoshi Murakami , Haruhiko Higuchi
- 优先权: JP2003-414895 20031212
- 国际申请: PCT/JP04/17736 WO 20041129
- 主分类号: G04F5/00
- IPC分类号: G04F5/00 ; G06F1/04
摘要:
Impact detecting resistors (141), (143) of an impact detecting circuit (104) detect a counter electromotive force of a step motor (105) generated due to an impact. This counter electromotive force is amplified applying a predetermined period and a predetermined chopper-width by a chopper-amplifying waveform shaping circuit (118). Therefore, even a light impact can be detected. Inverters (145), (146) compare these impact detecting signals (S22), (S23) with a threshold value and detect an impact when the signals exceeds the threshold value. A controlling circuit (102) provides a lock pulse to the step motor (105) through signal lines (AA), (BB) when an impact is detected, brakes rotation of a rotor (162) thereby preventing a deviation of the time displayed with a second hand (106).
公开/授权文献
信息查询