| 摘要 |
An implantable homing device having a transmitter, and a source of power connected to apply operating current to said transmitter; wherein said source of power comprises oscillator means 26, a battery 20 connected to energize said oscillator means, means applying the output of said oscillator means to said transmitter as a source of operating current therefor whereby said transmitter is intermittently operated, said transmitter comprising an oscillator 44 and a programmable signal generator 29 connected to provide a programmable output coded signal for modulating 41 said oscillator, and means 59 responsive to the voltage of said battery for controlling said programmable generator, whereby the output of said transmitter is modulated as a function of the voltage of said battery. The transmitted signal can identify the person in whom it is implanted, and he can be located by triangulation. <IMAGE> |
