Effectively Measuring Very Small Inductances-By Michael Obrecht, Ph.D., Director, Siborg Systems
Measurement of small inductances can be tricky. Typical LCR meters max out at test frequencies of 100 kHz. An inductance of 1 nH at 1 kHz only produces a 6 mΩ impedance, comparable to the contact resistance of the probes. Even at 1 Mhz the impedance would only be 60 mΩ.
Siborg Systems has developed a simple method of extraction of two-wire probe parasitic inductance, effectively measuring sub-nH inductances, and using the HP4284A LCR-meter and HP16034E test fixture.
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