A fast self-test device for hardware boards

Abstract

The invention provides a fast self-inspection device for hardware boards, which includes a precision sampling resistor, a switch switching unit, an operational amplifier unit, a current source, an analog-to-digital converter, a digital unit, and a processing and display unit. The precision sampling resistor is connected to the first The input terminal of a switch switching unit, the output terminal of the first switch switching unit is connected to the input terminal of the operational amplifier unit and the current source, the output terminal of the operational amplifier unit and the current source is connected to the input terminal of the second switch switching unit, and the second switch switches The output end of the unit is connected to the input end of the analog-to-digital converter, the output end of the analog-to-digital converter is connected to the input end of the third switching unit, the output end of the third switching unit is connected to the input end of the digital unit, and the output end of the digital unit is Connect the input terminal of the processing display unit. In the present invention, a precision sampling resistor is connected in series between the power supply module and the load, and the electrical parameters at both ends of the resistor are collected to complete the power indicator test.

Description

technical field [0001] The invention belongs to the technical field of circuit boards, in particular to a fast self-checking device for hardware boards. Background technique [0002] With the rapid development of science and technology, for modern large-scale FPGA, CPU, DSP chips, they adopt the most advanced transistor technology and top-notch architecture to achieve incredible flexibility and the highest performance. Over time and as technology advances, this complexity dictates that certain compromises need to be made when designing and implementing systems with circuits. This is most obvious in the power supply. Every time the chip is updated, the power supply must improve the accuracy, flexibility, controllability, efficiency and fault perception ability, and also reduce the size. [0003] In order to increase the operating speed, meet the requirements of extremely low device power supply noise, and reduce the risk of coupling or chatter between various modules in the ...

AI Technical Summary

Problems solved by technology

It is time-consuming to quickly find many power domain test points of large digital chips on high-speed boards. If people who are not familiar with boards test, the efficiency will be very low

[0009] (3) There will be measurement error during the test. First, the testers have different models of multimeters, resulting in data consistency errors

Secondly, during the test, it is necessary to manually transcribe the measured values ​​into the test report one by one, which may cause human errors in the values, and different personal habits may also cause the problem that the recorded values ​​are valid and different, and the data is not uniform and standardized.

[0010] (4) When the hardware board is working, the multimeter test cannot quickly monitor the voltage and current working status of many power domains

If you make a mistake, you will burn out the board or damage the instrument

[0013] (2) Although it is not necessary for the tester to manually touch the test points with the test leads in turn, it is still necessary to connect the flying leads to the test points one by one to the socket of the test box

There will be poor welding, welding short circuit, electrostatic discharge and other problems, which will damage the board

Moreover, the flying leads need to be temporarily manufactured according to the number of tests and the on-site environment, which indirectly increases the test time and complexity

[0015] (4) The data acquisition system can quickly and intuitively observe the working status of many power supplies on the board, but it can only test voltage and resistance or test current at the same time

This step introduces human error

[0016] (5) The fast and intuitive monitoring of the power domain status of the hardware board must use the data acquisition / switching system, but the board is used without monitoring equipment, and most users do not have such equipment

If there is an abnormality in the work, the problem cannot be located immediately. It is still necessary to build a data acquisition / switching system or use a multimeter to manually test the power domain sequentially, which is not convenient for real-time location of the problem on site.

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