发明授权
- 专利标题: Anti-theft system for a motor vehicle
- 专利标题(中): 汽车防盗系统
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申请号: US198886申请日: 1998-11-24
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公开(公告)号: US6100603A公开(公告)日: 2000-08-08
- 发明人: Peter Gold
- 申请人: Peter Gold
- 申请人地址: DEX Munich
- 专利权人: Siemens Aktiengesellschaft
- 当前专利权人: Siemens Aktiengesellschaft
- 当前专利权人地址: DEX Munich
- 优先权: DEX19752029 19971124
- 主分类号: B60R25/04
- IPC分类号: B60R25/04 ; E05B49/00 ; G07C9/00 ; H01Q1/22 ; H01Q7/00 ; H04Q9/00 ; B60R25/10
摘要:
Antennas of an anti-theft system are controlled with a pulse width modulated square-wave signal by a power control unit and a phase control unit. The control is such that a change in power causes no change in phase, and vice versa. This is accomplished by varying the pulse width of the square-wave signal if a change in power occurs and at the same time shifting the pulse rise time such that the phase remains constant.
公开/授权文献
- US5492445A Hook nozzle arrangement for supporting airfoil vanes 公开/授权日:1996-02-20