A multi-mode multi-frequency baseband chip pin control circuit and control method
A baseband chip, pin control technology, applied in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc. The effect of improving compatibility and reducing the number of PIN pins
Active Publication Date: 2017-09-19
WUHAN MENGXIN TECH CO LTD
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide a multi-mode multi-frequency baseband chip pin control circuit and a control method that solves the problem that there are fewer PIN pins available for the intermediate frequency signal of the baseband chip and affects the function or performance of the multi-mode multi-frequency system
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[0042] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples cited are only used to explain the present invention and not used to limit the scope of the present invention.
[0043] Such as figure 1 As shown, it is a schematic diagram of the connection between the radio frequency chip and the baseband chip that does not use the pin control chip. The pins occupy a lot and are not compatible with multi-bit wide radio frequency signals. If the chip DIE input baseband signal pins are directly led to the packaged Chip PIN pin, once the data signal sequence is wrong when the chip is used to design the circuit board or module, such as the position of the sign bit and the value bit of the signal data is wrong, the whole design cannot be used, but if the chip management can be realized through software configuration By selecting the position of the foot, the position adjustment of the data signal can be realize...
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The invention relates to a multi-mode multi-frequency baseband chip pin control circuit. The pin control circuit is arranged between a radio frequency chip and a baseband signal processing module; sampling clock and multi-mode multi frequency signal sampling data which are outputted by the radio frequency chip are sent to the pin control circuit; and the pin control circuit performs sampling clock edge selection, pin position selection or multiplexing function selection control on input data according to selection control signals outputted by the baseband signal processing module, and sends processed data to the baseband signal processing module for processing the data. The implementation cost of the multi-mode multi-frequency baseband chip pin control circuit is low; altogether N bits of baseband signal are inputted; only 2*N triggers, (N+1) alternative data selectors, and N one-out-N data selectors are required; as for intermediate-frequency signals outputted by the radio frequency chip, a sampling clock can be selected to carry out rising edge or falling edge sampling, and therefore, the usability of the baseband chip and the compatibility of the radio frequency chip can be greatly improved, and the number of pins in chip DIE encapsulation can be decreased, and functions are not affected basically.
Description
Technical field [0001] The invention relates to the field of satellite navigation baseband chip design, in particular to a multi-mode multi-frequency baseband chip pin control circuit and control method. Background technique [0002] With the rapid development of GNSS (Global Navigation Satellite System) technology and the continuous improvement of application requirements, multi-mode GNSS systems that use multi-system signals for joint positioning have shown great advantages. Multi-mode multi-frequency receivers can receive satellite signals of multiple frequencies at the same time, and use multi-system joint positioning technology to greatly improve positioning accuracy and reliability, and quickly become a research and application hotspot in the field of navigation. [0003] In the satellite navigation receiver where the baseband chip and the radio frequency chip are separated, the radio frequency chip is responsible for radio frequency transceiver, frequency synthesis, power am...
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IPC IPC(8): G01S19/32
CPCG01S19/32
Inventor 马百良肖永田
Owner WUHAN MENGXIN TECH CO LTD