| 摘要 |
<p>A system operable with a passive anti theft security system having a first coil (21) connected to a passive anti theft controller for transmitting a first signal to a first transponder (41) having a third coil (3) and a first code therein, said first transponder (41) responsive to said signal transmitting said first code to said first coil (21), the system comprising a second transponder (42) having a second code and a fourth coil (4) with two terminal ends wound about said third coil (3) of said second transponder (42); and a relay (13) selectively shorting or opening said terminal ends of said fourth coil (4) to selectively enable and disable said second transponder (42).</p> |
