A cold backup bus multiplexing circuit suitable for digital processing system

Abstract

Provided is a cold backup bus multiplexing circuit suitable for a digital processing system. Firstly, data transmission of a main control board and a plurality of controlled boards is subjected to data signal multiplexing, a plurality of controlled FPAG in each controlled board is interconnected in a daisy chain mode, secondly an interface impedance isolation circuit is added on the main control board and signal paths of the controlled boards to achieve impedance isolation between the received signals and the transmitted signals of the controlled boards and the impedance matching between the main control board and the plurality of controlled boards, finally the interface impedance matching circuit and the corresponding controlled boards are separately powered, the controlled boards match the impedance of the main control board in the on and off two states, and the data is multiplexed after the controlled boards are turned on.

Description

technical field [0001] The invention relates to a multi-band and multi-mode transponder system in the communication field, in particular to a cold backup bus multiplexing circuit suitable for a digital processing system. Background technique [0002] In the traditional transponder communication measurement and control system, the system generally uses fixed frequency bands, fixed frequency points and a single mode of operation. In the new generation of transponder communication measurement and control system, a complex system with multiple working frequency bands and multiple working modes is often used. The core functions and main technical indicators of the system require multiple sets of FPGAs. Through the main control board of the system, different software is loaded and refreshed. In order to realize arbitrary switching of different systems and functions. At present, under this working system, the traditional multi-board data transmission hardware design method is main...

AI Technical Summary

Problems solved by technology

For systems that use direct interconnection communication, the limited node resources of the connector restrict the data transmission path required by the multi-mode system, and based on the design trend of light and small products, it is difficult for the system to continuously expand the design scale to complete a large amount of data transmission.

The data bus protocol method needs to adopt the corresponding standard transmission protocol, but some FPGA interfaces do not necessarily support this mode protocol, which greatly limits the application of this interconnection method

Therefore, in the existing system design, there are many problems such as large design scale, frequent switching of multiple boards, and high power consumption of the system.

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