Hello~everyone
I have a question about
How to design a method to measure the input impedance of a digital multimeter?
I think it may involve the use of ohm's law,
can anyone help me?
Indeed it does involve the use of Ohm's law. In this case, Ohm's law as applied to a voltage divider. You will need a stable voltage source to measure, and an appropriately sized resistor. Use the multimeter to measure the voltage of the source, then insert a series resistor and determine how much the voltage measurement has dropped. That gives you enough information to calculate the DC input impedance.
