초록 ▼

An identification (ID) tag includes a substrate having an input capable of receiving a high frequency signal. For instance, the high frequency signal can be a radio frequency (RF) signal that is generated as part of a radio frequency (RF) ID system. A first charge pump is coupled to the input and is

An identification (ID) tag includes a substrate having an input capable of receiving a high frequency signal. For instance, the high frequency signal can be a radio frequency (RF) signal that is generated as part of a radio frequency (RF) ID system. A first charge pump is coupled to the input and is configured to convert the high frequency signal to a substantially direct current (DC) voltage. A data recovery circuit is coupled to the input and is capable of recovering data from the high frequency signal. A back scatter switch is coupled to the input and is capable of modifying an impedance of the input, responsive to a control signal. A state machine is disposed on the substrate and is responsive to the data recovered by the second charge pump, where the state machine is capable of generating the control signal for the back scatter switch in response to the data. The DC voltage from the first charge pump is capable of providing a voltage supply for at least one of the data recovery circuit, the back scatter switch, and the state machine. The data recovery circuit includes a second charge pump that is capable of operating on the high frequency signal simultaneously with the first charge pump. In other words, the first charge pump can generate the supply voltage for the ID tag from the high frequency signal, while the second charge pump simultaneously retrieves the data from the high frequency signal. The first charge pump also includes a means for limiting the amplitude of the DC voltage by reducing the charge pump efficiency, once a threshold voltage is reached.

대표청구항 ▼

An identification (ID) tag includes a substrate having an input capable of receiving a high frequency signal. For instance, the high frequency signal can be a radio frequency (RF) signal that is generated as part of a radio frequency (RF) ID system. A first charge pump is coupled to the input and is

An identification (ID) tag includes a substrate having an input capable of receiving a high frequency signal. For instance, the high frequency signal can be a radio frequency (RF) signal that is generated as part of a radio frequency (RF) ID system. A first charge pump is coupled to the input and is configured to convert the high frequency signal to a substantially direct current (DC) voltage. A data recovery circuit is coupled to the input and is capable of recovering data from the high frequency signal. A back scatter switch is coupled to the input and is capable of modifying an impedance of the input, responsive to a control signal. A state machine is disposed on the substrate and is responsive to the data recovered by the second charge pump, where the state machine is capable of generating the control signal for the back scatter switch in response to the data. The DC voltage from the first charge pump is capable of providing a voltage supply for at least one of the data recovery circuit, the back scatter switch, and the state machine. The data recovery circuit includes a second charge pump that is capable of operating on the high frequency signal simultaneously with the first charge pump. In other words, the first charge pump can generate the supply voltage for the ID tag from the high frequency signal, while the second charge pump simultaneously retrieves the data from the high frequency signal. The first charge pump also includes a means for limiting the amplitude of the DC voltage by reducing the charge pump efficiency, once a threshold voltage is reached. said motor vehicle security system.9. The alarm wrist watch of claim 8 further comprising a plurality of vehicle sensors, wherein said plurality of vehicle sensors comprises: a plurality of door sensors; an engine hood sensor; a trunk hood sensor; and a plurality of window sensors; said plurality of door sensors, said engine hood sensor, said trunk hood sensor and said plurality of window sensors in wireless communication with said audible alarm means and said visual alarm means. 10. The alarm wrist watch of claim 9, wherein said plurality of vehicle sensors further comprises a vehicle movement sensor in wireless communication with said audible alarm means and said visual alarm means, said vehicle movement sensor detecting extraneous movement of a vehicle not detected by a vibration sensor.11. The alarm wrist watch of claim 1 further comprising vibrational alarm means in wireless communication with said motor vehicle security system.12. The alarm wrist watch of claim 11 further comprising a plurality of vehicle sensors, wherein said plurality of vehicle sensors comprises: a plurality of door sensors; an engine hood sensor; a trunk hood sensor; and a plurality of window sensors; said plurality of door sensors, said engine hood sensor, said trunk hood sensor and said plurality of window sensors in wireless communication with said audible alarm means and said vibrational alarm means. 13. The alarm wrist watch of claim 12, wherein said plurality of vehicle sensors further comprises a vehicle movement sensor in wireless communication with said audible alarm means and said vibrational alarm means, said vehicle movement sensor detecting extraneous movement of a vehicle not detected by a vibration sensor.