µPC8103T, µPC8108T
TEST CIRCUIT 1
RS = 50 Ω, RL = 2 kΩ (CG MEASUREMENT)
Signal Generator (Lo)
50 Ω
1 000 pF
C2
NC 3
4
2
5
C1
1
6
50 Ω
1 000 pF
1 000 pF 3 300 pF 1 000 pF VCC
C3
C4
C5
L 150 µH
R 2 kΩ*
C6 1 000 pF
Signal Generator (RF)
50 Ω Supplement:
(50 Ω means impedance of measurement equipment)
Spectrum Analyser
* Note On 50 Ω measurement, this high inpedance IFout needs the calculatiuon as follows
CG (dB) = Measured value +20 log10 2 kΩ
50 Ω
TEST CIRCUIT 2
RS = RL = 50 Ω (NF MEASUREMENT)
Signal Generator (Lo)
50 Ω
1 000 pF
C2
NC 3
4
2
5
C1
1
6
1 000 pF
20 MHz
1 000 pF 3 300 pF 1 000 pF VCC
C3
C4
C5
L 150 µH
NOISE SOURCE
NF meter
C6 1 000 pF
50 Ω
50 Ω
6