Abstract: A system, for a vehicle, including a first wireless client station implemented in the vehicle, a wireless access point implemented in the vehicle, and a controller implemented in the vehicle. The first wireless client station is configured to transmit a first packet. The first packet includes a first command to control an operation of the vehicle. The wireless access point is configured to receive the first packet and transmit the first packet. The controller is configured to receive the first packet from the wireless access point and to control the operation of the vehicle in accordance with the first command included within the first packet.

Abstract: Methods, software, devices, and systems, for wireless interaction with control systems (e.g., control systems integrated with motor vehicles, commercial and/or residential buildings, appliances, or other complex integrated systems). The methods generally include establishing a first wireless communication channel between a handheld communication device and the control system and establishing a service provider communication channel between the handheld device and a service provider. The service provider communication channel generally includes a second wireless communication channel between the handheld communication device and a wireless communication provider node.

Abstract: Methods, software, devices, and systems, for wireless interaction with control systems (e.g., control systems integrated with motor vehicles, commercial and/or residential buildings, appliances, or other complex integrated systems). The methods generally include establishing a first wireless communication channel between a handheld communication device and the control system and establishing a service provider communication channel between the handheld device and a service provider. The service provider communication channel generally includes a second wireless communication channel between the handheld communication device and a wireless communication provider node.

Abstract: A system, for a vehicle, including a first wireless client station implemented in the vehicle, a wireless access point implemented in the vehicle, and a controller implemented in the vehicle. The first wireless client station is configured to transmit a first packet. The first packet includes a first command to control an operation of the vehicle. The wireless access point is configured to receive the first packet and transmit the first packet. The controller is configured to receive the first packet from the wireless access point and to control the operation of the vehicle in accordance with the first command included within the first packet.

Abstract: Vehicles having corresponding methods comprise a media source to provide digital data; a first wireless network station comprising a first transmitter to wirelessly transmit first packets of the digital data; a second wireless network station comprising a first receiver to wirelessly receive the first packets of the digital data; and a media player to reproduce media based on the first packets of the digital data wirelessly received by the second wireless network station.

Abstract: Vehicles having corresponding methods comprise a media source to provide digital data; a first wireless network station comprising a first transmitter to wirelessly transmit first packets of the digital data; a second wireless network station comprising a first receiver to wirelessly receive the first packets of the digital data; and a media player to reproduce media based on the first packets of the digital data wirelessly received by the second wireless network station.

Abstract: A system for a vehicle including a first user interface to generate a first command to receive audio/video data from a server in the vehicle, a first wireless client station to transmit a first packet including the first command, and a first wireless access point to (i) receive the first packet transmitted from the first wireless client and (ii) transmit the first packet to a wireless router. The wireless router routes the first packet to the server and routes, to the first wireless access point, packets received from the server in response to the first command, where the packets include the audio/video data. The first wireless access point transmits the packets to the first wireless client station. A media player (i) generates audio/video signals based on the packets received from the first wireless client station and (ii) outputs the audio/video signals to the first user interface.

Abstract: The invention relates to an adaptive Radio Frequency (RF) filter (11), which is particularly useful as an RF filter in Wireless Local Area Networks (WLAN's). As greater demands are placed on RF systems, for example in WLAN's in order to increase channel capacity by utilizing available bandwidth, corresponding demands are placed upon performance and tolerance of components used in FR circuits.

Abstract: Vehicles having corresponding methods comprise a media source to provide digital data; a first wireless network station comprising a first transmitter to wirelessly transmit first packets of the digital data; a second wireless network station comprising a first receiver to wirelessly receive the first packets of the digital data; and a media player to reproduce media based on the first packets of the digital data wirelessly received by the second wireless network station.

Abstract: An apparatus for improving signal mismatch compensation between first and second RF signals comprises: at least one switch which applies a first RF signal, present on a first pathway, and a second RF signal, present on a second pathway, to respective first and second frequency mixers, during a first time period; the mixers provide a first pair of mixed first and second RF signals. Means for reversing the at least one switch, during a subsequent time period is provided so that the first RF signal is applied to the second mixer, via the second pathway, and the second RF signal is applied to the first mixer, via the first pathway. The mixers thereby provide a second pair of mixed first and second RF signals. Monitoring monitors respective first and second pairs of mixed RF signals during an interval.

Abstract: The invention relates to an adaptive Radio Frequency (RF) filter (11), which is particlarly useful as an RF filter in Wireless Local Area Networks (WLAN's). As greater demands are placed on RF systems, for example in WLAN's in order to increase channel capacity by utilizing available bandwidth, corresponding demands are placed upon performance and tolerance of components used in FR circuits. An adaptive Radio Frequency (RF) filter for filtering first and second RF signals from an OFDM encoded carrier signal is provided, the adaptive RF filter comprises: a low-pass filter (102) configured to filter first and second RF signals, one from another, so as to provide a first RF output signal; the adaptive RF filter being tunable in response to one or more input signals, the at least one input signal being derived from a comparator (37,100), which compares the first RF output signal with a desired value for said first RF output signal, and provides a connection factor for varying a characteristic of the filter (102).

Abstract: A method of communicating with a plurality of contactless data carriers and a contactless data carrier for use in communicating with a base station. The method of communicating includes the base station transmitting a wake up signal for a plurality of contactless data carriers which are in a wait state. Then, the data carriers exit the wait state and transmit identity information to the base station in a time slot that is randomly self-assigned. The base station registers the identity information by polling the registered data carriers and initiates dialogue with registered data carriers in an order determined by the randomly self-assigned time slots of the registered data carriers. The method of communication helps to avoid the problem of data collision that often occurs when multiple contactless data carriers or smart cards operate in the field of a single base station or card reader.

Abstract: A data storage device (9) comprises an array of electronic memory locations (20) for storing data. An address input terminal (10) provides coupling to an address source and is coupled to provide first address signals from the address source to address the memory locations of the array (20). A data output terminal (12) provides coupling to a data reception arrangement and is connected to the array (20) for receiving data signals therefrom in response to the address signals. The data signals are indicative of the data stored in the memory locations addressed by the address signals. An address encryption arrangement (14) is coupled between the address input terminal (10) and the array (20) for encrypting the first address signals. The address encryption arrangement (14) contains encrypting data which is protected from direct optical determination, the encrypting data being used to encrypt the first address signals.

Abstract: A bus system has a main bus and an internal bus. The main bus is coupled to a number of driver units which drive data onto the main bus and to receiver units which respond to that data and provide response data to the main bus. A logic unit provides two-way communication directly between the main and internal buses and allows testing of individual driver and receiver units independently of other units.

Abstract: A clock signal conditioning circuit (100) for use in a smart card (102) has an input node (112) for receiving an applied clock signal, an output node (126) for producing a conditioned clock signal, a rising/falling edge detector (118) for detecting edges in the received clock signal, a bistable device (122) for forming at the output node a clock signal in response to the edge detector, and a timer (120, 124) for inhibiting switching of the bistable device for a predetermined time (T) following detection by the edge detector of an edge. Such a clock signal conditioning circuit provides a conditioned clock signal which is substantially independent of variations in the duty cycle of the applied clock signal and is substantially immune to glitches in the applied clock signal.

Abstract: A debit card of the type having an integrated circuit on a semiconductor chip embedded in a plastic card includes logic circuitry (10), a counter (2), a ROM (6) and an EEPROM (8) for storing the value of the counter between transactions. By providing two EEPROMs (8A, 8B) in parallel whose values are compared by a comparator (24), the security of the card is increased since operation of the card may be blocked if the two values are not the same, indicating that attempts have been made to fraudulently reprogram the card.

Abstract: An integrated circuit for a data or "smart" card includes a non-volatile memory (8) having a transport code preprogrammed therein, control circuitry (10), a comparator (24) for comprising an externally-applied code and the transport code, and a fuse (26) which is blown if the two codes match thereby allowing the card to be initialised with a personal identification number and initial credit values. A second fuse (28) may also be provided which is blown if the two codes do not match and sensing means (32, 34) sense the status of the two fuses (26, 28) and block any further attempts to initialise the card if the second fuse (28) is blown and the first fuse (26) is not.

Abstract: A data processor (2) including a watchdog timer (8) comprising: a first memory (4) holding a primary operating routine for cyclic execution during operation of the data processor, an address bus (6) for addressing locations in said first memory means, a timer (10) for continuous operation during operation of the data processor and for effecting a system reset in response to the timer reaching a predetermined value, the primary operating routine including at at least one predetermined location an instruction to reset the timer, whereby in normal operation of the data processor the timer does not reach the predetermined value, wherein the data processor further includes a second memory (12) for holding the address of the location containing the instruction to reset the timer, and a comparator (16) coupled to the address bus and the timer for preventing the timer from being reset in response to an instruction to reset the timer unless the address on the address bus is held in the second memory.

Abstract: An integrated circuit chip having a digital memory is provided wherein direct access to at least a portion of the memory is prevented. Contact pads having coupling lines to couple the contact pads to the memory bus are provided. A security code can be programmed into a portion of the memory during wafer probe and test. When the integrated circuit chip is removed from the wafer the coupling lines between the contact pads and the memory bus are destroyed since the coupling lines are made to extend off of the chip.

Abstract: A programmable transistor is provided adjacent to a programmable read only memory. A latch is used in conjunction with the programmable transistor and data is written into the latch. If the programmable transistor is programmed the output of the latch will be modified, however, if the programmable transistor is not programmed the output of the latch will not be modified when it is read. The programming pads used to program the programmable transistor are severed so they are no longer functional once the programmable transistor has been programmed. Therefore if someone erases the programmable read only meory the programmable transistor is also erased and cannot be reprogrammed.