Rapid self-checking device for hardware board card

Abstract

The invention provides a rapid self-checking device for a hardware board card. The device comprises 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 display unit. The precision sampling resistor is connected with the input end of the first switch switching unit; the output end ofthe first switch switching unit is connected with the operational amplifier unit and the input end of the current source. The output ends of the operational amplifier unit and the current source areconnected with the input end of the second switch switching unit; the output end of the second switch switching unit is connected with the input end of the analog-to-digital converter, the output endof the analog-to-digital converter is connected with the input end of the third switch switching unit, the output end of the third switch switching unit is connected with the input end of the digitalunit, and the output end of the digital unit is connected with the input end of the processing display unit. The precise sampling resistor is connected between a power supply module and a load in series, electrical parameters at two ends of the resistor are collected, and power supply index testing can be completed.

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 accuracy, flexibility, controllability, efficiency, and fault perception capabilities, as well as 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 ...

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, which causes 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 wires to the test points one by one to the card holder 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 at the same time it can only test voltage and resistance or test current

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 separated from the monitoring equipment when used, 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.

Images