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How to test a low voltage reference signal?

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leonken

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An analog IC chip, the output of one pin is a low voltage reference signal (about 300 mv).
My questions are:
1. Can you recommend some precise equipments to test such signal?
2. Because the signal is directly derived to output, dose any buffer circuit is needed?
 

Humungus

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If you have it, you can use HP4145, HP4155 or HP4156. The input impedance is 10GOhm
 

leonken

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Humungus said:
If you have it, you can use HP4145, HP4155 or HP4156. The input impedance is 10GOhm

Thank you very much.
How much is the HP4156?
 

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