BA3131FS
Standard ICs
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Measurement circuit
RK
RK
50kΩ
500kΩ
RK
500kΩ
0.1µF
C2
0.1µF
1000pF
C1
C3
15V
EK
VF
– 15V
–
+
+
–
DUT
NULL
V
CC
V
O
S1
Ri
Ri
10kΩ
Rs
50Ω
10kΩ
Rs
50Ω
Vref
Vref
VR
Vref
RL2
10kΩ
RL1
2kΩ
S3
S2
S4
Rf
50kΩ
∗
C2 and C3 are used to prevent oscillation (adjustment required)
Fig.1
