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Why does the resistance of VDD and GND become lower for a period of time after the circuit is powered on?

Hardware design
7月 07, 2020 by Fred 460

Using AD7682 sampling, the resistance between VDD and GND is normal before power-on. After power-on, the resistance is only a few tens of ohms for a period of time. If you continue to work, it will be short-circuited. What will cause the resistance of VDD and GND to become lower?

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Holland ポストする July 7, 2020

How do you judge the resistance between VDD and GND after power on?

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Norman ポストする July 7, 2020

Wouldn't it be to measure the resistance with a multimeter during live work? The resistance value can only be measured when the power is off.

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Stone ポストする July 7, 2020

SMD capacitors, I often encounter leakage of SMD capacitors, especially 105 and 106 are more, 104 is less! The most outrageous energy is the same as a 0 ohm resistor!

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