
MEASURING CIRCUITS
(i) Measuring Circuit for Stabilized Voltage VZ
IZ = 5 mA
A
2
RB
µPC574
EB
1
V Digital Volt Meter
µPC574
(ii) Measuring Circuit for Dynamic Resistance rZ
IZ
A
RB
C
0.1 µF
EB
2
µPC574
1
IAC
=
IZ
10
+
50 µF
100 Ω
VV2
VV1
f = 1 kHz
VZ
IZ
0.5 mA 5 mA
rZ
=
VV1
0.5 mA
VV1
4