37
Append
2
Open/Short compensation
For those precision impedance measuring instrument,the open and short
compensation need to be used to reduce the parasitic effect of the test
fixture。The parasitic effect of the test fixture can be treated like the simple
passive components in figure 3.7a。When the DUT is open,the instrument gets
the conductance Yp=Gp+jwCp(Figure 3.7b) 。When the DUT is short,the
instrument gets the impedance Zs=Rs+jwLs(Figure 3.7c)。After open and
short compensation,Yp and Zs are for calculating the real Zdut(Figure 3.7d)。
Redundant Zs
H
CUR
●
Parastic Yo
D
U
T
Co
●
Rs Ls
●
●
●
H
POT
L
POT
L
CUR
Parastic effect of test fixture
Zm
●
Go
Parastic of test fixture
Содержание MPT LCR01A
Страница 23: ...22...
Страница 25: ...24 SMD Test Probe...
Страница 26: ...25 Kelvin Clip Test Probe...
Страница 29: ...28 HCUR A V D U T Co Ro Lo Ro Lo D U T HPOT LPOT LCUR 1m 10m 100m 1 10 100 1K 10K 100K 1M 10M Figure 1 2T Impe...
Страница 31: ...30 A V D U T 2 T with shielding 1m 10m 100m 1 10 100 1K 10K 100K 1M 10M Figure 2 continued 3T impe...
Страница 35: ...34 1m 10m 100m 1 10 100 1K 10K 100K 1M 10M HCUR A V D U T D U T HPOT LPOT LCUR Impe 5T...
Страница 36: ...35 HCUR A V D U T D U T HPOT LPOT LCUR 1m 10m 100m 1 10 100 1K 10K 100K 1M 10M 4T Impe...