Multi-channel analog module with function of eliminating crosstalk and control method thereof

Abstract

In a high-density analog input module, a novel technology implementation method is used for a multi-channel module; and the multi-channel module has a function of eliminating crosstalk. The invention provides a multi-channel analog module, which comprises first to nth multiplexers which are connected in parallel with one another, an (n+1)th multiplexer, an amplifier and an analog-to-digital converter, wherein each of the first to nth multiplexers is provided with more than two data input ends for receiving input data; address selection code input ends of the first to nth multiplexers are used for receiving address selection codes so as to control to select a path of input data from all the data input ends, and n output ends of the first to nth multiplexers are connected in parallel and used for outputting the selected path of data; n is a natural number; the (n+1)th multiplexer is provided with a first input end, a second input end, a third input end, an address selection code input end and an output end; the amplifier is used for receiving the output from the (n+1)th multiplexer and is provided with a negative signal input end; and the analog-to-digital converter is used for performing analog-to-digital conversion on the output of the amplifier.

Description

technical field [0001] The invention relates to a design of a multi-channel analog module, more specifically, to a high-density multi-channel analog module with crosstalk elimination and a control method thereof. Background technique [0002] There are two existing methods: [0003] 1. The disadvantage of using a 16-channel multiplexer without a fault protection scheme is obvious, and has very poor performance in terms of wrong signal connection and EMC (Electromagnetic Compatibility, Electromagnetic Compatibility) immunity. [0004] 2. Search and select an 8-channel ADC (analog-to-digital converter, analog-to-digital converter) without a multiplexer. This solution will require many additional amplifiers, which is for the PCB (Printed Circuit Board, printed circuit board) This is not possible due to limited space. Moreover, its cost is relatively high. And there is no hardware solution to reduce the crosstalk problem. [0005] Moreover, neither of the above two solutions...

AI Technical Summary

Problems solved by technology

Also, the cost is higher

And there is no hardware solution to reduce the crosstalk problem

[0005] Moreover, neither of the above two solutions has good scalability and is not easy to be reused by similar products

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