Vehicle location unit
AssigneeTadiran Ltd.
InventorsShemon Nahear, Chaim Caspi
Life of this patent
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Abstract
A Vehicle Location Unit (VLU) device includes in functional relationship an RF receiver, a transmitter, a receive/transmit switch, a microcontroller to control the receiving/transmitting path, a digital Large Scale Integration (LSI), having a digital signal processing device, a crystal oscillator, and a filtering device for an outcoming signal.
Claims8
A Vehicle Location Unit (VLU) device having means for transmitting a signal, means for receiving a signal, a microcontroller for controlling a transmitting/receiving path, and conventional circuit elements comprising memory means, power supply means, the device comprising:
- a digital Large Scale Integration (LSI) including:
- timing and control means for providing a timing and control signal to each transmission/reception phase of operation of the VLU;
- a signal processor being connected to the receiving means and the timing and control means, the signal processor receiving a signal from the receiving means;
- a PN generator being connected to the timing and control means, the PN generator generating a required bit pattern to a digital shaper;
- and
- said digital shaper having a first input which is connected to the timing and control means and a second input based on said required bit pattern, which is connected to the PN generator, the digital shaper outputting a shaping control signal to an analog LSI;
- and
- said analog LSI including:
- a Digital Temperature Compensated Crystal Oscillator (DTCXO) for sensing a temperature and translating the sensed temperature into digital data which are read by the microcontroller;
- and
- a transversal filter converting said shaping control signal into an analog-shaped data, the transversal filter having an output which is connected to the transmitting means.
A Vehicle Location Unit (VLU) device having means for transmitting a signal, means for receiving a signal, and conventional circuit elements comprising memory means, power supply means, the device comprising:
- a digital Large Scale Integration (LSI) being connected to the receiving means;
- and
- an analog LSI comprising:
- a Digital Temperature Compensated Crystal Oscillator (DTCXO) being coupled to the digital LSI, the DTCXO sensing a temperature and translating the sensed temperature into digital data, and the DTCXO sending a control signal to the digital LSI;
- and
- a transversal filter converting a data bit stream into an analog-shaped data, the transversal filter having an output which is connected to the transmitter means.
A Vehicle Location Unit (VLU) device comprising means for transmitting a signal, means for receiving a signal, and conventional circuit elements comprising memory means, and power supply means, the device comprising:
- a digital Large Scale Integration (LSI) including:
- a signal processor connecting to the receiving means and receiving a signal therefrom;
- a PN generator;
- timing and control means connected to said processor and said generator for initializing and stopping the transmission/reception phases of operation of the device;
- a digital shaper receiving the data generated by said generator;
- the device further comprising:
- a Digital Temperature Compensated Crystal Oscillator (DTCXO) being coupled to the digital LSI, the DTCXO sensing a temperature and translating the sensed temperature into digital data, and the DTCXO sending a control signal to the digital LSI;
- and
- a transversal filter converting a data bit stream into an analog-shaped data, the transversal filter having an output connected to said transmitting means.
Dependencies are inferred from the claim text.