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A combined vehicle remote access, tire monitoring and vehicle immobilization system and method including a tire monitor for monitoring a tire parameter, the monitor including a transmitter for transmitting a radio frequency tire data signal, a vehicle access transmitter for transmitting a radio freq

A combined vehicle remote access, tire monitoring and vehicle immobilization system and method including a tire monitor for monitoring a tire parameter, the monitor including a transmitter for transmitting a radio frequency tire data signal, a vehicle access transmitter for transmitting a radio frequency vehicle access signal, and a vehicle activation transponder for receiving an interrogation signal and transmitting a vehicle activation signal for use in vehicle immobilization. The system and method further include a control module having a receiver and a controller for receiving and processing the tire data, vehicle access, and vehicle activation signals, and generating a display signal to display the information represented by the tire data signal, a vehicle access control signal to perform the vehicle access function, and a vehicle immobilization control signal to immobilize the vehicle if the controller fails to authenticate the vehicle activation signal.

대표청구항 ▼

A combined vehicle remote access, tire monitoring and vehicle immobilization system and method including a tire monitor for monitoring a tire parameter, the monitor including a transmitter for transmitting a radio frequency tire data signal, a vehicle access transmitter for transmitting a radio freq

A combined vehicle remote access, tire monitoring and vehicle immobilization system and method including a tire monitor for monitoring a tire parameter, the monitor including a transmitter for transmitting a radio frequency tire data signal, a vehicle access transmitter for transmitting a radio frequency vehicle access signal, and a vehicle activation transponder for receiving an interrogation signal and transmitting a vehicle activation signal for use in vehicle immobilization. The system and method further include a control module having a receiver and a controller for receiving and processing the tire data, vehicle access, and vehicle activation signals, and generating a display signal to display the information represented by the tire data signal, a vehicle access control signal to perform the vehicle access function, and a vehicle immobilization control signal to immobilize the vehicle if the controller fails to authenticate the vehicle activation signal. ckage includes: (1) a substantially planar piezoelectric substrate, (2) SAW circuit conductors located over the substrate and (3) a passivation layer located over the SAW circuit conductors, the substrate and the passivation layer cooperating to form a hermetic seal to isolate the SAW circuit conductors from an environment proximate the package. ast a third diode coupled between the second input and the output and a fourth diode coupled to a reference potential so that the third diode is forward biased and the fourth diode is reversed biased by the common series biasing current when the signal on the second input is to be coupled to the output and so that the third diode is reversed biased and the fourth diode is forward biased by the common series biasing current when the signal on the first input is to be coupled to the output. 5. The RF A/B switch of claim 4 wherein the first diode circuit in its blocking configuration includes a first equivalent series impedance, wherein the second diode circuit in its blocking configuration includes a second equivalent series impedance, wherein the RF A/B switch further comprises first and second compensation impedances, wherein the first compensation impedance is coupled to the first diode circuit, wherein the first compensation impedance is arranged to substantially cancel the first equivalent series impedance at a first predetermined frequency, wherein the second compensation impedance is coupled to the third diode circuit, and wherein the second compensation impedance is arranged to substantially cancel the second equivalent series impedance at a second predetermined frequency. 6. The RF A/B switch of claim 1 wherein the plurality of diodes of the first diode circuit comprises first, second, third, and fourth diodes, wherein the first and second diodes are coupled between the first input and the output, wherein the third and fourth diodes are coupled to a reference potential, wherein the common series biasing current forward biases the first and second diodes and reverse biases the third and fourth diodes when the signal on the first input is to be coupled to the output, and wherein the common series biasing current reverse biases the first and second diodes and forward biases the third and fourth diodes when the signal on the second input is to be coupled to the output. 7. The RF A/B switch of claim 6 wherein the first diode circuit in its blocking configuration includes an equivalent series impedance, wherein the RF A/B switch further comprises a compensation impedance, wherein the compensation impedance is coupled to the first diode circuit, and wherein the compensation impedance is arranged to substantially cancel the equivalent series impedance at a predetermined frequency. 8. The RF A/B switch of claim 6 wherein the plurality of diodes of the second diode circuit comprises fifth, sixth, seventh, and eighth diodes, wherein the fifth and sixth diodes are coupled between the second input and the output, wherein the seventh and eighth diodes are coupled to a reference potential, wherein the common series biasing current forward biases the fifth and sixth diodes and reverse biases the seventh and eighth diodes when the signal on the second input is to be coupled to the output, and wherein the common series biasing current reverse biases the fifth and sixth diodes and forward biases the seventh and eighth diodes when the signal on the first input is to be coupled to the output. 9. The RF A/B switch of claim 8 wherein the first diode circuit in its blocking configuration includes a first equivalent series impedance, wherein the second diode circuit in its blocking configuration includes a second equivalent series impedance, wherein the RF A/B switch further comprises first and second compensation impedances, wherein the first compensation impedance is coupled to the first diode circuit, wherein the first compensation impedance is arranged to substantially cancel the first equivalent series impedance at a first predetermined frequency, wherein the second compensation impedance is coupled to the second diode circuit, and wherein the second compensation impedance is arranged to substantially cancel the second equivalent series impedance at a second predetermined frequency. 10. The RF A/B switch of claim 1 wherein the first diode